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Preview: Recent Articles in Phys. Rev. B

Recent Articles in Phys. Rev. B



Recent articles in Physical Review B



Published: 2018-01-19T18:02:52+00:00

 



Ultrafast laser-induced changes of the magnetic anisotropy in a low-symmetry iron garnet film

2018-01-19T10:00:00+00:00

Author(s): L. A. Shelukhin, V. V. Pavlov, P. A. Usachev, P. Yu. Shamray, R. V. Pisarev, and A. M. Kalashnikova

We explore a thermal mechanism of changing the magnetic anisotropy by using femtosecond laser pulses in a low-symmetry dielectric ferrimagnetic garnet ${(\mathrm{YBiPrLu})}_{3}{(\mathrm{FeGa})}_{5}{\mathrm{O}}_{12}$ film grown on the (210)-type ${\mathrm{Gd}}_{3}{\mathrm{Ga}}_{5}{\mathrm{O}}_{12}$ s...


[Phys. Rev. B 97, 014422] Published Fri Jan 19, 2018



Superfluidity, Bose-Einstein condensation, and structure in one-dimensional Luttinger liquids

2018-01-19T10:00:00+00:00

Author(s): L. Vranješ Markić, H. Vrcan, Z. Zuhrianda, and H. R. Glyde

We report diffusion Monte Carlo (DMC) and path integral Monte Carlo (PIMC) calculations of the properties of a one-dimensional (1D) Bose quantum fluid. The equation of state, the superfluid fraction ${ρ}_{S}/{ρ}_{0}$, the one-body density matrix $n(x)$, the pair distribution function $g(x)$, and the...


[Phys. Rev. B 97, 014513] Published Fri Jan 19, 2018



Scanning tunneling microscopy and spectroscopy studies of the heavy-electron superconductor ${\mathrm{TlNi}}_{2}{\mathrm{Se}}_{2}$

2018-01-19T10:00:00+00:00

Author(s): Stefan Wilfert, Martin Schmitt, Henrik Schmidt, Tobias Mauerer, Paolo Sessi, Hangdong Wang, Qianhui Mao, Minghu Fang, and Matthias Bode

We report on the structural and superconducting electronic properties of the heavy-electron superconductor ${\mathrm{TlNi}}_{2}{\mathrm{Se}}_{2}$. By using a variable-temperature scanning tunneling microscopy (VT-STM) the coexistence of $(\sqrt{2}\phantom{\rule{0.16em}{0ex}}×\phantom{\rule{0.16em}{0...


[Phys. Rev. B 97, 014514] Published Fri Jan 19, 2018



Magnetic disorder in superconductors: Enhancement by mesoscopic fluctuations

2018-01-19T10:00:00+00:00

Author(s): I. S. Burmistrov and M. A. Skvortsov

We study the density of states (DOS) and the transition temperature ${T}_{c}$ in a dirty superconducting film with rare classical magnetic impurities of an arbitrary strength described by the Poissonian statistics. We take into account that the potential disorder is a source of mesoscopic fluctuatio...


[Phys. Rev. B 97, 014515] Published Fri Jan 19, 2018



Wide applicability of high-${T}_{c}$ pairing originating from coexisting wide and incipient narrow bands in quasi-one-dimensional systems

2018-01-19T10:00:00+00:00

Author(s): Karin Matsumoto, Daisuke Ogura, and Kazuhiko Kuroki

We study superconductivity in the Hubbard model on various quasi-one-dimensional lattices with coexisting wide and narrow bands originating from multiple sites within a unit cell, where each site corresponds to a single orbital. The systems studied are the two-leg and three-leg ladders, the diamond ...


[Phys. Rev. B 97, 014516] Published Fri Jan 19, 2018



Transient electronic anisotropy in overdoped $\mathrm{NaF}{\mathrm{e}}_{1−x}\mathrm{C}{\mathrm{o}}_{x}\mathrm{As}$ superconductors

2018-01-19T10:00:00+00:00

Author(s): Shenghua Liu, Chunfeng Zhang, Qiang Deng, Hai-hu Wen, Jian-xin Li, Elbert E. M. Chia, Xiaoyong Wang, and Min Xiao

By combining polarized pump-probe spectroscopic and Laue x-ray diffraction measurements, we have observed nonequivalent transient optical responses with the probe beam polarized along the $x$ and $y$ axes in overdoped $\mathrm{NaF}{\mathrm{e}}_{1\text{–}x}\mathrm{C}{\mathrm{o}}_{x}\mathrm{As}$ super...


[Phys. Rev. B 97, 020505(R)] Published Fri Jan 19, 2018



Quantum magnetomechanics: Towards the ultrastrong coupling regime

2018-01-19T10:00:00+00:00

Author(s): E. Romero-Sánchez, W. P. Bowen, M. R. Vanner, K. Xia, and J. Twamley

In this paper we investigate a hybrid quantum system comprising a mechanical oscillator coupled via magnetic induced electromotive force to an $LC$ resonator. We derive the Lagrangian and Hamiltonian for this system and find that the interaction can be described by a charge-momentum coupling with a ...


[Phys. Rev. B 97, 024109] Published Fri Jan 19, 2018



Origin of the net magnetic moment in ${\mathrm{LaCoO}}_{3}$

2018-01-19T10:00:00+00:00

Author(s): G. M. Kaminsky, D. P. Belanger, F. Ye, J. A. Fernandez-Baca, J. Wang, M. Matsuda, and J.-Q. Yan

The authors here combine polarized neutron scattering experimental work with computational minimization of proposed Hamiltonians in an effort to understand the low-temperature magnetic behavior in small applied magnetic fields for LaCoO3. They provide an exceptionally comprehensive study of the phase diagrams generated by various Hamiltonians germane to a situation in which magnetic ordering occurs at twin boundaries due to antiferromagnetic chains crossing the boundary at an angle different than 90°.

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[Phys. Rev. B 97, 024418] Published Fri Jan 19, 2018



Hyperfine interactions of ${\mathrm{Er}}^{3+}$ ions in ${\mathrm{Y}}_{2}{\mathrm{SiO}}_{5}$: Electron paramagnetic resonance in a tunable microwave cavity

2018-01-19T10:00:00+00:00

Author(s): Yu-Hui Chen, Xavier Fernandez-Gonzalvo, Sebastian P. Horvath, Jelena V. Rakonjac, and Jevon J. Longdell

The hyperfine structure of the ground state of erbium-doped yttrium orthosilicate is analyzed with the use of electron paramagnetic resonance experiments in a tunable microwave resonator. This work was prompted by the disagreement between a recent measurement made at zero magnetic field and a previo...


[Phys. Rev. B 97, 024419] Published Fri Jan 19, 2018



Ab initio calculation of spin fluctuation spectra using time-dependent density functional perturbation theory, plane waves, and pseudopotentials

2018-01-19T10:00:00+00:00

Author(s): Kun Cao, Henry Lambert, Paolo G. Radaelli, and Feliciano Giustino

We present an implementation of time-dependent density functional perturbation theory for spin fluctuations, based on plane waves and pseudopotentials. We compute the dynamic spin susceptibility self-consistently by solving the time-dependent Sternheimer equation, within the adiabatic local density ...


[Phys. Rev. B 97, 024420] Published Fri Jan 19, 2018



Spin order in the charge disproportionated phases of the $A$-site layer ordered triple perovskite $\mathrm{LaC}{\mathrm{a}}_{2}\mathrm{F}{\mathrm{e}}_{3}{\mathrm{O}}_{9}$

2018-01-19T10:00:00+00:00

Author(s): Angel M. Arevalo-Lopez, Yoshiteru Hosaka, Haichuan Guo, Fabio Denis Romero, Takashi Saito, J. Paul Attfield, and Yuichi Shimakawa

The coupling between spins and charge disproportionation states has been investigated in the $\mathrm{LaC}{\mathrm{a}}_{2}\mathrm{F}{\mathrm{e}}_{3}{\mathrm{O}}_{9}$ oxide with neutron powder diffraction. This $A$-site layer ordered triple perovskite $\mathrm{LaC}{\mathrm{a}}_{2}\mathrm{F}{\mathrm{e...


[Phys. Rev. B 97, 024421] Published Fri Jan 19, 2018



Superconductivity, pairing symmetry, and disorder in the doped topological insulator ${\mathrm{Sn}}_{1−x}{\mathrm{In}}_{x}\mathrm{Te}$ for $x≥0.10$

2018-01-19T10:00:00+00:00

Author(s): M. P. Smylie, H. Claus, W.-K. Kwok, E. R. Louden, M. R. Eskildsen, A. S. Sefat, R. D. Zhong, J. Schneeloch, G. D. Gu, E. Bokari, P. M. Niraula, A. Kayani, C. D. Dewhurst, A. Snezhko, and U. Welp

The temperature dependence of the London penetration depth $\mathrm{Δ}λ(T)$ in the superconducting doped topological crystalline insulator ${\mathrm{Sn}}_{1−x}{\mathrm{In}}_{x}\mathrm{Te}$ was measured down to 450 mK for two different doping levels, $x≈0.45$ (optimally doped) and $x≈0.10$ (underdope...


[Phys. Rev. B 97, 024511] Published Fri Jan 19, 2018



Imaginary part of Hall conductivity in a tilted doped Weyl semimetal with both broken time-reversal and inversion symmetry

2018-01-19T10:00:00+00:00

Author(s): S. P. Mukherjee and J. P. Carbotte

We consider a Weyl semimetal with finite doping and tilt within a continuum model Hamiltonian with both broken time-reversal and inversion symmetry. We calculate the absorptive part of the anomalous ac Hall conductivity as a function of photon energy $\mathrm{Ω}$ for both type-I and type-II Weyl sem...


[Phys. Rev. B 97, 035144] Published Fri Jan 19, 2018



Nonlocal heat transport and improved target design for x-ray heating studies at x-ray free electron lasers

2018-01-19T10:00:00+00:00

Author(s): Oliver Hoidn and Gerald T. Seidler

The extremely high-power densities and short durations of single pulses of x-ray free electron lasers (XFELs) have opened new opportunities in atomic physics, where complex excitation-relaxation chains allow for high ionization states in atomic and molecular systems, and in dense plasma physics, whe...


[Phys. Rev. B 97, 035145] Published Fri Jan 19, 2018



Tuning the electronic properties of ${\mathrm{LaAlO}}_{3}$/${\mathrm{SrTiO}}_{3}$ interfaces by irradiating the ${\mathrm{LaAlO}}_{3}$ surface with low-energy cluster ion beams

2018-01-19T10:00:00+00:00

Author(s): Karl Ridier, Damien Aureau, Bruno Bérini, Yves Dumont, Niels Keller, Jackie Vigneron, Arnaud Etcheberry, Bernadette Domengès, and Arnaud Fouchet

We have investigated the effects of low-energy ion beam irradiations using argon clusters on the chemical and electronic properties of ${\mathrm{LaAlO}}_{3}$/${\mathrm{SrTiO}}_{3}$ (LAO/STO) heterointerfaces by combining x-ray photoelectron spectroscopy (XPS) and electrical transport measurements. D...


[Phys. Rev. B 97, 035146] Published Fri Jan 19, 2018



Bending mode and thermal expansion of graphene

2018-01-19T10:00:00+00:00

Author(s): V. N. Bondarev, V. M. Adamyan, and V. V. Zavalniuk

Proceeding from the model of a two-dimensional elastic continuum, we describe the characteristic features of the thermal expansion of graphene using an approach that goes beyond the quasiharmonic approximation. The negative value of the thermal expansion coefficient of graphene at low temperatures a...


[Phys. Rev. B 97, 035426] Published Fri Jan 19, 2018



Soft antiphase tilt of oxygen octahedra in the hybrid improper multiferroic ${\mathrm{Ca}}_{3}{\mathrm{Mn}}_{1.9}{\mathrm{Ti}}_{0.1}{\mathrm{O}}_{7}$

2018-01-19T10:00:00+00:00

Author(s): Feng Ye, Jinchen Wang, Jieming Sheng, C. Hoffmann, T. Gu, H. J. Xiang, Wei Tian, J. J. Molaison, A. M. dos Santos, M. Matsuda, B. C. Chakoumakos, J. A. Fernandez-Baca, X. Tong, Bin Gao, Jae Wook Kim, and S.-W. Cheong

We report a single crystal neutron and x-ray diffraction study of the hybrid improper multiferroic ${\mathrm{Ca}}_{3}{\mathrm{Mn}}_{1.9}{\mathrm{Ti}}_{0.1}{\mathrm{O}}_{7}$ (CMTO), a prototypical system where the electric polarization arises from the condensation of two lattice distortion modes. Wit...


[Phys. Rev. B 97, 041112(R)] Published Fri Jan 19, 2018



Existence of electron and hole pockets and partial gap opening in the correlated semimetal ${\mathbf{Ca}}_{\mathbf{3}}{\mathbf{Ru}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{7}}$

2018-01-19T10:00:00+00:00

Author(s): Hui Xing, Libin Wen, Chenyi Shen, Jiaming He, Xinxin Cai, Jin Peng, Shun Wang, Mingliang Tian, Zhu-An Xu, Wei Ku, Zhiqiang Mao, and Ying Liu

The electronic band structure of correlated ${\mathrm{Ca}}_{3}{\mathrm{Ru}}_{2}{\mathrm{O}}_{7}$ featuring an antiferromagnetic (AFM) as well as a structural transition has been determined theoretically at high temperatures, which has led to the understanding of the remarkable properties of ${\mathr...


[Phys. Rev. B 97, 041113(R)] Published Fri Jan 19, 2018



Crystal orientation dependence of the spin-orbit coupling in InAs nanowires

2018-01-19T10:00:00+00:00

Author(s): T. S. Jespersen, P. Krogstrup, A. M. Lunde, R. Tanta, T. Kanne, E. Johnson, and J. Nygård

We compare the spin-orbit interaction (SOI) in InAs nanowires grown in the conventional $〈0001〉$ crystal direction and the perpendicular $〈01\overline{1}0〉$ direction. It is theoretically shown that, for individual transverse modes, the intrinsic contribution due to the bulk inversion asymmetry of t...


[Phys. Rev. B 97, 041303(R)] Published Fri Jan 19, 2018



Coupling of molecular motion and electronic state in the organic molecular dimer Mott insulator ${β}^{′}$-(BEDT-TTF)${}_{2}{\mathrm{ICl}}_{2}$

2018-01-19T10:00:00+00:00

Author(s): Masashi Sawada, Shuhei Fukuoka, and Atsushi Kawamoto

We have performed $^{1}\mathrm{H}$ NMR and $^{13}\mathrm{C}$ NMR measurements to investigate the coupling between molecular dynamics and the electronic state of ${β}^{′}$-(BEDT-TTF)${}_{2}{\mathrm{ICl}}_{2}$. From the $^{1}\mathrm{H}$ NMR measurements, we observed a frequency-dependent anomaly in th...


[Phys. Rev. B 97, 045136] Published Fri Jan 19, 2018



Direct observation of double exchange in ferromagnetic ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{CoO}}_{3}$ by broadband ellipsometry

2018-01-19T10:00:00+00:00

Author(s): P. Friš, D. Munzar, O. Caha, and A. Dubroka

We present results of our broadband ellipsometry measurements of the optical response of ferromagnetic ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{CoO}}_{3}$. Our data show that the ferromagnetic transition is accompanied by a transfer of optical spectral weight from an absorption band centered ...


[Phys. Rev. B 97, 045137] Published Fri Jan 19, 2018



Indirect coupling of magnons by cavity photons

2018-01-18T10:00:00+00:00

Author(s): Babak Zare Rameshti and Gerrit E. W. Bauer

The interaction between two magnetic spheres in microwave cavities is studied by Mie scattering theory beyond the magnetostatic and rotating wave approximations. We demonstrate that two spatially separated dielectric and magnetic spheres can be strongly coupled over a long distance by the electric f...


[Phys. Rev. B 97, 014419] Published Thu Jan 18, 2018



Three-dimensional magnetic critical behavior in ${\mathrm{CrI}}_{3}$

2018-01-18T10:00:00+00:00

Author(s): Yu Liu (刘育) and C. Petrovic

Low-dimensional intrinsically ferromagnetic semiconductors are rare and crucial to develop the next-generation spintronics devices. CrI3 is a promising candidate since its ferromagnetism can be maintained upon exfoliating of bulk crystals down to single layer. However, the nature of magnetism in bulk CrI3 is still unclear. Here, the authors experimentally study the critical properties of bulk CrI3 around the paramagnetic to ferromagnetic phase transition, and idenify clearly three-dimensional long-range magnetic coupling with the exchange distance decaying as J(r)r4.69 in bulk CrI3.

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[Phys. Rev. B 97, 014420] Published Thu Jan 18, 2018



Mutual influence between macrospin reversal order and spin-wave dynamics in isolated artificial spin-ice vertices

2018-01-18T10:00:00+00:00

Author(s): F. Montoncello, L. Giovannini, Wonbae Bang, J. B. Ketterson, M. B. Jungfleisch, A. Hoffmann, B. W. Farmer, and L. E. De Long

We theoretically and experimentally investigate magnetization reversal and associated spin-wave dynamics of isolated threefold vertices that constitute a Kagome lattice. The three permalloy macrospins making up the vertex have an elliptical cross section and a uniform thickness. We study the dc magn...


[Phys. Rev. B 97, 014421] Published Thu Jan 18, 2018



Snowflake phononic topological insulator at the nanoscale

2018-01-18T10:00:00+00:00

Author(s): Christian Brendel, Vittorio Peano, Oskar Painter, and Florian Marquardt

The authors propose here the first experimentally viable scheme of a topological insulator for sound waves at the nanoscale. This significantly advances the field of nanoscale phononics, adding helical waveguides to its toolbox. The proposed device could hardly be simpler as it relies purely on a geometrical design, based on the “snowflake” phononic crystal that has already been demonstrated experimentally.

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[Phys. Rev. B 97, 020102(R)] Published Thu Jan 18, 2018



Understanding photon sideband statistics and correlation for determining phonon coherence

2018-01-18T10:00:00+00:00

Author(s): Ding Ding, Xiaobo Yin, and Baowen Li

Generating and detecting coherent high-frequency heat-carrying phonons have been topics of great interest in recent years. Although there have been successful attempts in generating and observing coherent phonons, rigorous techniques to characterize and detect phonon coherence in a crystalline mater...


[Phys. Rev. B 97, 020302(R)] Published Thu Jan 18, 2018



Magnetism of the $A$-site ordered perovskites ${\mathrm{CaCu}}_{3}{\mathrm{Cr}}_{4}{\mathrm{O}}_{12}$ and ${\mathrm{LaCu}}_{3}{\mathrm{Cr}}_{4}{\mathrm{O}}_{12}$

2018-01-18T10:00:00+00:00

Author(s): Jun Sugiyama, Hiroshi Nozaki, Izumi Umegaki, Kazutoshi Miwa, Wataru Higemoto, Eduardo J. Ansaldo, Jess H. Brewer, Hiroya Sakurai, Masahiko Isobe, Hidenori Takagi, and Martin Månsson

The microscopic magnetic nature of the $A$-site ordered chromium perovskites ${\mathrm{CaCu}}_{3}{\mathrm{Cr}}_{4}{\mathrm{O}}_{12}$ and ${\mathrm{LaCu}}_{3}{\mathrm{Cr}}_{4}{\mathrm{O}}_{12}$ and their solid-solution system, ${\mathrm{Ca}}_{1−x}{\mathrm{La}}_{x}{\mathrm{Cu}}_{3}{\mathrm{Cr}}_{4}{\m...


[Phys. Rev. B 97, 024416] Published Thu Jan 18, 2018



Double-spiral magnetic structure of the Fe/Cr multilayer revealed by nuclear resonance reflectivity

2018-01-18T10:00:00+00:00

Author(s): M. A. Andreeva, R. A. Baulin, A. I. Chumakov, R. Rüffer, G. V. Smirnov, Y. A. Babanov, D. I. Devyaterikov, M. A. Milyaev, D. A. Ponomarev, L. N. Romashev, and V. V. Ustinov

We have studied the magnetization depth profiles in a ${[}^{57}\mathrm{Fe}({d}_{\mathrm{Fe}})/\mathrm{Cr}({d}_{\mathrm{Cr}}){]}_{30}$ multilayer with ultrathin Fe layers and nominal thickness of the chromium spacers ${d}_{\mathrm{Cr}}≈2.0\phantom{\rule{0.16em}{0ex}}\mathrm{nm}$ using nuclear resonan...


[Phys. Rev. B 97, 024417] Published Thu Jan 18, 2018



Electronic structure and magnetic properties of the half-metallic ferrimagnet ${\mathrm{Mn}}_{2}\mathrm{VAl}$ probed by soft x-ray spectroscopies

2018-01-18T10:00:00+00:00

Author(s): K. Nagai, H. Fujiwara, H. Aratani, S. Fujioka, H. Yomosa, Y. Nakatani, T. Kiss, A. Sekiyama, F. Kuroda, H. Fujii, T. Oguchi, A. Tanaka, J. Miyawaki, Y. Harada, Y. Takeda, Y. Saitoh, S. Suga, and R. Y. Umetsu

We have studied the electronic structure of ferrimagnetic ${\mathrm{Mn}}_{2}\mathrm{VAl}$ single crystals by means of soft x-ray absorption spectroscopy (XAS), x-ray absorption magnetic circular dichroism (XMCD), and resonant soft x-ray inelastic scattering (RIXS). We have successfully observed the ...


[Phys. Rev. B 97, 035143] Published Thu Jan 18, 2018



Parallel and antiparallel angular momentum transfer of circularly polarized light to photoelectrons and Auger electrons at the Ni ${L}_{3}$ absorption threshold

2018-01-18T10:00:00+00:00

Author(s): Fumihiko Matsui, Hiroshi Ota, Kenji Sugita, Matthias Muntwiler, Roland Stania, and Thomas Greber

We report the investigation of the angular momentum transfer of light to photoelectrons and Auger electrons at the Ni ${L}_{3}$ absorption threshold. Upon core-level excitation by circularly polarized light, the angular momentum of light, or helicity, is transferred to the emitted photoelectron. The...


[Phys. Rev. B 97, 035424] Published Thu Jan 18, 2018



Influence of the effective layer thickness on the ground-state and excitonic properties of transition-metal dichalcogenide systems

2018-01-18T10:00:00+00:00

Author(s): L. Meckbach, T. Stroucken, and S. W. Koch

The effective dimensionality of a semiconductor strongly influences its excitonic properties. Due to their unit-cell thickness, monolayer materials are the almost perfect realization of a two-dimensional system. However, the unit-cell dimensions can easily exceed the nominal value of the exciton Bohr radius. Employing a fully microscopic theory based on the equation-of-motion approach, it is shown that the effective finite-layer thickness in transition metal dichalcogenides (TMDCs) is responsible for the observed nonhydrogenic exciton series, not only in monolayers, but also in few-layer and bulk systems. The theoretical results identify the resonances in bulk TMDCs as due to quasi-two-dimensional intra- and interlayer excitons.

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[Phys. Rev. B 97, 035425] Published Thu Jan 18, 2018



Correlation function diagnostics for type-I fracton phases

2018-01-18T10:00:00+00:00

Author(s): Trithep Devakul, S. A. Parameswaran, and S. L. Sondhi

Fracton phases are recent entrants to the roster of topological phases in three dimensions. They are characterized by subextensively divergent topological degeneracy and excitations that are constrained to move along lower-dimensional subspaces, including the eponymous fractons that are immobile in ...


[Phys. Rev. B 97, 041110(R)] Published Thu Jan 18, 2018



Flat band in disorder-driven non-Hermitian Weyl semimetals

2018-01-18T10:00:00+00:00

Author(s): A. A. Zyuzin and A. Yu. Zyuzin

We study the interplay of disorder and band-structure topology in a Weyl semimetal with a tilted conical spectrum around the Weyl points. The spectrum of particles is given by the eigenvalues of a non-Hermitian matrix, which contains contributions from a Weyl Hamiltonian and complex self-energy due ...


[Phys. Rev. B 97, 041203(R)] Published Thu Jan 18, 2018



Dimensionality-driven orthorhombic $\mathrm{MoT}{\mathrm{e}}_{2}$ at room temperature

2018-01-18T10:00:00+00:00

Author(s): Rui He, Shazhou Zhong, Hyun Ho Kim, Gaihua Ye, Zhipeng Ye, Logan Winford, Daniel McHaffie, Ivana Rilak, Fangchu Chen, Xuan Luo, Yuping Sun, and Adam W. Tsen

We use a combination of Raman spectroscopy and transport measurements to study thin flakes of the type-II Weyl semimetal candidate $\mathrm{MoT}{\mathrm{e}}_{2}$ protected from oxidation. In contrast to bulk crystals, which undergo a phase transition from monoclinic to the inversion symmetry breakin...


[Phys. Rev. B 97, 041410(R)] Published Thu Jan 18, 2018



Viscosity of a multichannel one-dimensional Fermi gas

2018-01-18T10:00:00+00:00

Author(s): Wade DeGottardi and K. A. Matveev

Many one-dimensional systems of experimental interest possess multiple bands arising from shallow confining potentials. In this paper, we study a gas of weakly interacting fermions and show that the bulk viscosity is dramatically altered by the occupation of more than one band. The reasons for this ...


[Phys. Rev. B 97, 045135] Published Thu Jan 18, 2018



Hidden edge Dirac point and robust quantum edge transport in InAs/GaSb quantum wells

2018-01-18T10:00:00+00:00

Author(s): Chang-An Li, Song-Bo Zhang, and Shun-Qing Shen

The robustness of quantum edge transport in InAs/GaSb quantum wells in the presence of magnetic fields raises an issue on the fate of topological phases of matter under time-reversal symmetry breaking. A peculiar band structure evolution in InAs/GaSb quantum wells is revealed: the electron subbands ...


[Phys. Rev. B 97, 045420] Published Thu Jan 18, 2018



Stochastic generation of complex crystal structures combining group and graph theory with application to carbon

2018-01-17T10:00:00+00:00

Author(s): Xizhi Shi, Chaoyu He, Chris J. Pickard, Chao Tang, and Jianxin Zhong

A method is introduced to stochastically generate crystal structures with defined structural characteristics. Reasonable quotient graphs for symmetric crystals are constructed using a random strategy combined with space group and graph theory. Our algorithm enables the search for large-size and comp...


[Phys. Rev. B 97, 014104] Published Wed Jan 17, 2018



Interplay between magnetic domain patterning and anisotropic magnetoresistance probed by magneto-optics

2018-01-17T10:00:00+00:00

Author(s): J. Osten, K. Lenz, H. Schultheiss, J. Lindner, J. McCord, and J. Fassbender

We study the correlation between the magnetic reversal and the anisotropic magnetoresistance (AMR) response in magnetic hybrid structures that were created by local modification of magnetic properties induced by ion implantation. The stripe pattern has been investigated simultaneously by dual-wavele...


[Phys. Rev. B 97, 014415] Published Wed Jan 17, 2018



24-spin clusters in the mineral boleite ${\mathrm{KPb}}_{26}{\mathrm{Ag}}_{9}{\mathrm{Cu}}_{24}{\mathrm{Cl}}_{62}{(\mathrm{OH})}_{48}$

2018-01-17T10:00:00+00:00

Author(s): E. S. Dreier, S. L. Holm, K. Lønbæk, U. B. Hansen, M. Medarde, I. Živković, P. Babkevich, M. Ruminy, N. Casati, A. Piovano, S. Rols, G. J. Nilsen, M. Boehm, M. Skoulatos, J. Schefer, H. M. Rønnow, T. Fennell, and K. Lefmann

The crystal structure of the mineral boleite contains clusters of 24 $S=1/2\phantom{\rule{4pt}{0ex}}{\mathrm{Cu}}^{2+}$ ions that have the shape of a truncated cube formed of eight trimers connected by edges. Susceptibility measurements and exact diagonalization calculations suggest that there are s...


[Phys. Rev. B 97, 014416] Published Wed Jan 17, 2018



Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures

2018-01-17T10:00:00+00:00

Author(s): Johanna Fischer, Olena Gomonay, Richard Schlitz, Kathrin Ganzhorn, Nynke Vlietstra, Matthias Althammer, Hans Huebl, Matthias Opel, Rudolf Gross, Sebastian T. B. Goennenwein, and Stephan Geprägs

We investigate the spin Hall magnetoresistance in thin-film bilayer heterostructures of the heavy metal Pt and the antiferromagnetic insulator NiO. While rotating an external magnetic field in the easy plane of NiO, we record the longitudinal and the transverse resistivity of the Pt layer and observ...


[Phys. Rev. B 97, 014417] Published Wed Jan 17, 2018



Magnetoelectric antiferromagnets as platforms for the manipulation of solitons

2018-01-17T10:00:00+00:00

Author(s): Ricardo Zarzuela, Se Kwon Kim, and Yaroslav Tserkovnyak

We study the magnetic dynamics of magnetoelectric antiferromagnetic thin films, where an unconventional boundary ferromagnetism coexists with the bulk Néel phase below the Néel temperature. The spin exchange between the two order parameters yields an effective low-energy theory that is formally equi...


[Phys. Rev. B 97, 014418] Published Wed Jan 17, 2018



Direct observation of in-plane anisotropy of the superconducting critical current density in $\mathbf{Ba}{({\mathbf{Fe}}_{1−x}{\mathbf{Co}}_{x})}_{2}{\mathbf{As}}_{2}$ crystals

2018-01-17T10:00:00+00:00

Author(s): J. Hecher, S. Ishida, D. Song, H. Ogino, A. Iyo, H. Eisaki, M. Nakajima, D. Kagerbauer, and M. Eisterer

The phase diagram of iron-based superconductors exhibits structural transitions, electronic nematicity, and magnetic ordering, which are often accompanied by an electronic in-plane anisotropy and a sharp maximum of the superconducting critical current density (${J}_{\text{c}}$) near the phase bounda...


[Phys. Rev. B 97, 014511] Published Wed Jan 17, 2018



Theory of superconductivity with non-Hermitian and parity-time reversal symmetric Cooper pairing symmetry

2018-01-17T10:00:00+00:00

Author(s): Ananya Ghatak and Tanmoy Das

Recently developed parity ($\mathcal{P}$) and time-reversal ($\mathcal{T}$) symmetric non-Hermitian systems govern a rich variety of new and characteristically distinct physical properties, which may or may not have a direct analog in their Hermitian counterparts. We study here a non-Hermitian, $\ma...


[Phys. Rev. B 97, 014512] Published Wed Jan 17, 2018



Scaling universality at the dynamic vortex Mott transition

2018-01-17T10:00:00+00:00

Author(s): M. Lankhorst, N. Poccia, M. P. Stehno, A. Galda, H. Barman, F. Coneri, H. Hilgenkamp, A. Brinkman, A. A. Golubov, V. Tripathi, T. I. Baturina, and V. M. Vinokur

The cleanest way to observe a dynamic Mott insulator-to-metal transition (DMT) without the interference from disorder and other effects inherent to electronic and atomic systems, is to employ the vortex Mott states formed by superconducting vortices in a regular array of pinning sites. Here, we repo...


[Phys. Rev. B 97, 020504(R)] Published Wed Jan 17, 2018



High-pressure phases of ${\mathrm{VO}}_{2}$ from the combination of Raman scattering and ab initio structural search

2018-01-17T10:00:00+00:00

Author(s): Victor Balédent, Tiago T. F. Cerqueira, Rafael Sarmiento-Pérez, Abhay Shukla, Christophe Bellin, Marino Marsi, Jean-Paul Itié, Matteo Gatti, Miguel A. L. Marques, Silvana Botti, and Jean-Pascal Rueff

Despite more than 50 years of investigation, the understanding of the metal-insulator transition in ${\mathrm{VO}}_{2}$ remains incomplete and requires additional experimental and theoretical works. Using Raman scattering under pressure, we first confirm the known transition around 11 GPa affecting ...


[Phys. Rev. B 97, 024107] Published Wed Jan 17, 2018



Nature of the octahedral tilting phase transitions in perovskites: A case study of ${\mathrm{CaMnO}}_{3}$

2018-01-17T10:00:00+00:00

Author(s): Johan Klarbring and Sergei I. Simak

The temperature-induced antiferrodistortive (AFD) structural phase transitions in ${\mathrm{CaMnO}}_{3}$, a typical perovskite oxide, are studied using first-principles density functional theory calculations. These transitions are caused by tilting of the ${\mathrm{MnO}}_{6}$ octahedra that are rela...


[Phys. Rev. B 97, 024108] Published Wed Jan 17, 2018



Emergent odd-parity multipoles and magnetoelectric effects on a diamond structure: Implication for the $5d$ transition metal oxides $A{\mathrm{OsO}}_{4}\phantom{\rule{4pt}{0ex}}(A=\mathrm{K},\text{Rb},\text{and Cs})$

2018-01-17T10:00:00+00:00

Author(s): Satoru Hayami, Hiroaki Kusunose, and Yukitoshi Motome

We report our theoretical predictions on the linear magnetoelectric (ME) effects originating from odd-parity multipoles associated with spontaneous spin and orbital ordering on a diamond structure. We derive a two-orbital model for $d$ electrons in ${e}_{g}$ orbitals by including the effective spin-...


[Phys. Rev. B 97, 024414] Published Wed Jan 17, 2018



Effect of chemical pressure on the crystal electric field states of erbium pyrochlore magnets

2018-01-17T10:00:00+00:00

Author(s): J. Gaudet, A. M. Hallas, A. I. Kolesnikov, and B. D. Gaulin

We have carried out a systematic study of the crystal electric field excitations in the family of cubic pyrochlores ${\mathrm{Er}}_{2}{B}_{2}{\mathrm{O}}_{7}$ with $B=\mathrm{Ge}$, Ti, Pt, and Sn, using neutron spectroscopy. All members of this family are magnetic insulators based on $4{f}^{11}\phan...


[Phys. Rev. B 97, 024415] Published Wed Jan 17, 2018



Excitation of terahertz modes localized on a layered superconductor: Anomalous dispersion and resonant transmission

2018-01-17T10:00:00+00:00

Author(s): S. S. Apostolov, N. M. Makarov, and V. A. Yampol'skii

We study theoretically the optic transmission through a slab of layered superconductor separated from two dielectric leads by spatial gaps. Based on the transfer matrix formalism along with the Josephson plasma electrodynamic approach, we derive analytic expressions for the transmittance and identif...


[Phys. Rev. B 97, 024510] Published Wed Jan 17, 2018



Phase transition and intrinsic metric of dipolar fermions in the quantum Hall regime

2018-01-17T10:00:00+00:00

Author(s): Zi-Xiang Hu, Qi Li, Lin-Peng Yang, Wu-Qing Yang, Na Jiang, Rui-Zhi Qiu, and Bo Yang

For the fast rotating quasi-two-dimensional dipolar fermions in the quantum Hall regime, the rotational symmetry in the two-body interaction breaks when the dipole moment has an in-plane component that can be tuned by an external field. Assuming that all the dipoles are polarized in the same directi...


[Phys. Rev. B 97, 035140] Published Wed Jan 17, 2018



Renormalization of Coulomb interactions in a system of two-dimensional tilted Dirac fermions

2018-01-17T10:00:00+00:00

Author(s): Yu-Wen Lee and Yu-Li Lee

We investigate the effects of long-ranged Coulomb interactions in a tilted Dirac semimetal in two dimensions by using the perturbative renormalization-group (RG) method. Depending on the magnitude of the tilting parameter, the undoped system can have either Fermi points (type I) or Fermi lines (type...


[Phys. Rev. B 97, 035141] Published Wed Jan 17, 2018



Entanglement and magnetism in high-spin graphene nanodisks

2018-01-17T10:00:00+00:00

Author(s): I. Hagymási and Ö. Legeza

We investigate the ground-state properties of triangular graphene nanoflakes with zigzag edge configurations. The description of zero-dimensional nanostructures requires accurate many-body techniques since the widely used density-functional theory with local density approximation or Hartree-Fock met...


[Phys. Rev. B 97, 035142] Published Wed Jan 17, 2018



Floquet band structure of a semi-Dirac system

2018-01-17T10:00:00+00:00

Author(s): Qi Chen, Liang Du, and Gregory A. Fiete

In this work we use Floquet-Bloch theory to study the influence of circularly and linearly polarized light on two-dimensional band structures with semi-Dirac band touching points, taking the anisotropic nearest neighbor hopping model on the honeycomb lattice as an example. We find that circularly po...


[Phys. Rev. B 97, 035422] Published Wed Jan 17, 2018



Ballistic near-field heat transport in dense many-body systems

2018-01-17T10:00:00+00:00

Author(s): Ivan Latella, Svend-Age Biehs, Riccardo Messina, Alejandro W. Rodriguez, and Philippe Ben-Abdallah

Radiative heat transport mediated by near-field interactions is known to be superdiffusive in dilute, many-body systems. Here we use a generalized Landauer theory of radiative heat transfer in many-body planar systems to demonstrate a nonmonotonic transition from superdiffusive to ballistic transpor...


[Phys. Rev. B 97, 035423] Published Wed Jan 17, 2018



Edge insulating topological phases in a two-dimensional superconductor with long-range pairing

2018-01-17T10:00:00+00:00

Author(s): L. Lepori, D. Giuliano, and S. Paganelli

We study the zero-temperature phase diagram of a two-dimensional square lattice loaded by spinless fermions, with nearest-neighbor hopping and algebraically decaying pairing. We find that for sufficiently long-range pairing, new phases occur, not continuously connected with any short-range phase and...


[Phys. Rev. B 97, 041109(R)] Published Wed Jan 17, 2018



Environmentally sensitive theory of electronic and optical transitions in atomically thin semiconductors

2018-01-17T10:00:00+00:00

Author(s): Yeongsu Cho and Timothy C. Berkelbach

Due to their small size, atomically thin materials are expected to exhibit electronic properties that are highly sensitive to their environment. However, atomically thin semiconductors on a variety of substrates, as well as in their bulk layered phase, exhibit an absorption onset at roughly the same energy. The authors provide a semianalytic theory of the quasiparticle band gap in atomically thin semiconductors and show that environment-induced changes are almost exactly canceled by changes in the exciton binding energy, leaving the absorption onset nearly constant. The presented theory sets limits on the prospect of environmental engineering in atomically thin materials.

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[Phys. Rev. B 97, 041409(R)] Published Wed Jan 17, 2018



Engineering the Kondo state in two-dimensional semiconducting phosphorene

2018-01-17T10:00:00+00:00

Author(s): Rohit Babar and Mukul Kabir

Correlated interaction between dilute localized impurity electrons and the itinerant host conduction electrons in metals gives rise to the conventional many-body Kondo effect below sufficiently low temperature. In sharp contrast to these conventional Kondo systems, we report an intrinsic, robust, an...


[Phys. Rev. B 97, 045132] Published Wed Jan 17, 2018



Charge density wave states in tantalum dichalcogenides

2018-01-17T10:00:00+00:00

Author(s): David C. Miller, Subhendra D. Mahanti, and Phillip M. Duxbury

Using density functional theory, we explore a range of charge density wave states (CDWs) in tantalum-based transition-metal dichalcogenide monolayers. The high-symmetry states of the $1H$ phases of $\mathrm{Ta}{X}_{2}$ ($X$ = S, Se, Te) are lower in total energy compared to the $1T$ variants, while ...


[Phys. Rev. B 97, 045133] Published Wed Jan 17, 2018



Evolution of ground-state wave function in ${\mathbf{CeCoIn}}_{5}$ upon Cd or Sn doping

2018-01-17T10:00:00+00:00

Author(s): K. Chen, F. Strigari, M. Sundermann, Z. Hu, Z. Fisk, E. D. Bauer, P. F. S. Rosa, J. L. Sarrao, J. D. Thompson, J. Herrero-Martin, E. Pellegrin, D. Betto, K. Kummer, A. Tanaka, S. Wirth, and A. Severing

We present linear polarization-dependent soft-x-ray absorption spectroscopy data at the Ce ${M}_{4,5}$ edges of Cd- and Sn-doped ${\mathrm{CeCoIn}}_{5}$. The $4f$ ground-state wave functions have been determined for their superconducting, antiferromagnetic, and paramagnetic ground states. The absenc...


[Phys. Rev. B 97, 045134] Published Wed Jan 17, 2018



Photoluminescence excitation study of split-vacancy centers in diamond

2018-01-17T10:00:00+00:00

Author(s): E. A. Ekimov, P. S. Sherin, V. S. Krivobok, S. G. Lyapin, V. A. Gavva, and M. V. Kondrin

Two known representatives of the split-vacancy complexes in diamond, the negatively charged silicon-vacancy ${\mathrm{SiV}}^{−}$ and recently discovered germanium-vacancy ${\mathrm{GeV}}^{−}$ defects, were comparatively studied for their photoluminescence (PL) and complementary optical absorption sp...


[Phys. Rev. B 97, 045206] Published Wed Jan 17, 2018



Selective adsorption of toluene-3,4-dithiol on Si(553)-Au surfaces

2018-01-17T10:00:00+00:00

Author(s): Svetlana Suchkova, Conor Hogan, Friedhelm Bechstedt, Eugen Speiser, and Norbert Esser

The adsorption of small organic molecules onto vicinal Au-stabilized Si(111) surfaces is shown to be a versatile route towards controlled growth of ordered organic-metal hybrid one-dimensional nanostructures. Density functional theory is used to investigate the site-specific adsorption of toluene-3,...


[Phys. Rev. B 97, 045417] Published Wed Jan 17, 2018



Spin-selective electron transfer in a quantum dot array

2018-01-17T10:00:00+00:00

Author(s): Shumpei Masuda, Kuan Yen Tan, and Mikio Nakahara

We propose a spin-selective coherent electron transfer in a silicon quantum dot array. Oscillating magnetic fields and temporally controlled gate voltages are utilized to separate the electron wave function into different quantum dots depending on the spin state. We introduce a nonadiabatic protocol...


[Phys. Rev. B 97, 045418] Published Wed Jan 17, 2018



Renormalization of the Majorana bound state decay length in a perpendicular magnetic field

2018-01-17T10:00:00+00:00

Author(s): M. P. Nowak and P. Wójcik

Orbital effects of a magnetic field in a proximitized semiconductor nanowire are studied in the context of the spatial extent of Majorana bound states. We develop an analytical model that explains the impact of concurring effects of paramagnetic coupling of the nanowire bands via the kinetic energy ...


[Phys. Rev. B 97, 045419] Published Wed Jan 17, 2018



Magnetization plateaus in the spin-$\frac{1}{2}$ antiferromagnetic Heisenberg model on a kagome-strip chain

2018-01-16T10:00:00+00:00

Author(s): Katsuhiro Morita, Takanori Sugimoto, Shigetoshi Sota, and Takami Tohyama

The spin-$\frac{1}{2}$ Heisenberg model on a kagome lattice is a typical frustrated quantum spin system. The basic structure of a kagome lattice is also present in the kagome-strip lattice in one dimension, where a similar type of frustration is expected. We thus study the magnetization plateaus of ...


[Phys. Rev. B 97, 014412] Published Tue Jan 16, 2018



Spontaneous dimerization and moment formation in the Hida model of the spin-1 kagome antiferromagnet

2018-01-16T10:00:00+00:00

Author(s): Pratyay Ghosh and Brijesh Kumar

The Hida model, defined on a honeycomb lattice, is a spin-1/2 Heisenberg model of aniferromagnetic hexagons (with nearest-neighbor interaction, ${J}_{A}>0)$ coupled via ferromagnetic bonds (with exchange interaction, ${J}_{F}<0)$. It applies to the spin-gapped organic materials, $\mathrm{m}\te...


[Phys. Rev. B 97, 014413] Published Tue Jan 16, 2018



Comparison of Gabay–Toulouse and de Almeida–Thouless instabilities for the spin-glass XY model in a field on sparse random graphs

2018-01-16T10:00:00+00:00

Author(s): Cosimo Lupo and Federico Ricci-Tersenghi

Vector spin glasses are known to show two different kinds of phase transitions in the presence of an external field: the so-called de Almeida–Thouless and Gabay–Toulouse lines. While the former has been studied to some extent on several topologies (fully connected, random graphs, finite-dimensional ...


[Phys. Rev. B 97, 014414] Published Tue Jan 16, 2018



Dynamics of the vortex line density in superfluid counterflow turbulence

2018-01-16T10:00:00+00:00

Author(s): D. Khomenko, V. S. L'vov, A. Pomyalov, and I. Procaccia

Describing superfluid turbulence at intermediate scales between the intervortex distance and the macroscale requires an acceptable equation of motion for the density of quantized vortex lines $\mathcal{L}$. The closure of such an equation for superfluid inhomogeneous flows requires additional inputs...


[Phys. Rev. B 97, 014508] Published Tue Jan 16, 2018



Study of $^{11}\mathrm{B}$ and $^{13}\mathrm{C}$ NMR on doped ${\mathrm{MgB}}_{2}$ in the normal and in the superconducting state

2018-01-16T10:00:00+00:00

Author(s): R. W. Bounds, E. Pavarini, M. Paolella, E. Young, I. Heinmaa, R. Stern, and M. Carravetta

We have studied carbon-doped magnesium diboride nanoparticles using $^{13}\mathrm{C}$ and $^{11}\mathrm{B}$ NMR in the normal and superconducting states. Measurements of the line shape reveal the role of carbon as a flux-pinning center and, combined with Knight shift measurements, suggest the doping...


[Phys. Rev. B 97, 014509] Published Tue Jan 16, 2018



Topological superconductor in quasi-one-dimensional ${\mathrm{Tl}}_{2−x}{\mathrm{Mo}}_{6}{\mathrm{Se}}_{6}$

2018-01-16T10:00:00+00:00

Author(s): Shin-Ming Huang, Chuang-Han Hsu, Su-Yang Xu, Chi-Cheng Lee, Shiue-Yuan Shiau, Hsin Lin, and Arun Bansil

We propose that the quasi-one-dimensional molybdenum selenide compound ${\mathrm{Tl}}_{2−x}{\mathrm{Mo}}_{6}{\mathrm{Se}}_{6}$ is a time-reversal-invariant topological superconductor induced by intersublattice pairing, even in the absence of spin-orbit coupling (SOC). No noticeable change in superco...


[Phys. Rev. B 97, 014510] Published Tue Jan 16, 2018



Topological dynamics of vortex-line networks in hexagonal manganites

2018-01-16T10:00:00+00:00

Author(s): Fei Xue, Nan Wang, Xueyun Wang, Yanzhou Ji, Sang-Wook Cheong, and Long-Qing Chen

The two-dimensional $XY$ model is the first well-studied system with topological point defects. On the other hand, although topological line defects are common in three-dimensional systems, the evolution mechanism of line defects is not fully understood. The six domains in hexagonal manganites conve...


[Phys. Rev. B 97, 020101(R)] Published Tue Jan 16, 2018



Rapid suppression of the charge density wave in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.6}$ under hydrostatic pressure

2018-01-16T10:00:00+00:00

Author(s): S. M. Souliou, H. Gretarsson, G. Garbarino, A. Bosak, J. Porras, T. Loew, B. Keimer, and M. Le Tacon

We report on the effects of hydrostatic pressure (HP) on the charge density wave observed in underdoped cuprates. We studied ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.6}\phantom{\rule{4pt}{0ex}}({T}_{c}=61$ K) using high-resolution inelastic x-ray scattering (IXS), and reveal an extreme se...


[Phys. Rev. B 97, 020503(R)] Published Tue Jan 16, 2018



Thermodynamically complete equation of state of MgO from true radiative shock temperature measurements on samples preheated to 1850 K

2018-01-16T10:00:00+00:00

Author(s): O. V. Fat'yanov, P. D. Asimow, and T. J. Ahrens

Plate impact experiments in the 100–250 GPa pressure range were done on a $〈100〉$ single-crystal MgO preheated before compression to 1850 K. Hot Mo(driver)-MgO targets were impacted with Mo or Ta flyers launched by the Caltech two-stage light-gas gun up to 7.5 km/s. Radiative temperatures and shock ...


[Phys. Rev. B 97, 024106] Published Tue Jan 16, 2018



Spectral statistics and scattering resonances of complex primes arrays

2018-01-16T10:00:00+00:00

Author(s): Ren Wang, Felipe A. Pinheiro, and Luca Dal Negro

We introduce a class of aperiodic arrays of electric dipoles generated from the distribution of prime numbers in complex quadratic fields (Eisenstein and Gaussian primes) as well as quaternion primes (Hurwitz and Lifschitz primes), and study the nature of their scattering resonances using the vector...


[Phys. Rev. B 97, 024202] Published Tue Jan 16, 2018



Trapped-mode-induced Fano resonance and acoustical transparency in a one-dimensional solid-fluid phononic crystal

2018-01-16T10:00:00+00:00

Author(s): Ilyasse Quotane, El Houssaine El Boudouti, and Bahram Djafari-Rouhani

We investigate theoretically and numerically the possibility of existence of Fano and acoustic-induced transparency (AIT) resonances in a simple though realistic one-dimensional acoustic structure made of solid-fluid layers inserted between two fluids. These resonances are obtained by combining appr...


[Phys. Rev. B 97, 024304] Published Tue Jan 16, 2018



Theory of the magnetic skyrmion glass

2018-01-16T10:00:00+00:00

Author(s): Shintaro Hoshino and Naoto Nagaosa

Magnetic skyrmions discovered in chiral magnets show unique physical properties due to their nontrivial topology. While their basic properties have been well understood for pure systems, in real materials there is always disorder from, for example, crystal defects or impurities. This glassy nature substantially modifies the low-energy behavior, and hence the investigation of the skyrmion glass is crucial to understanding real materials. Here, the authors theoretically study disordered chiral magnets in terms of replica field theory, and provide a firm basis to explore the glassy state of magnetic skyrmions.

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[Phys. Rev. B 97, 024413] Published Tue Jan 16, 2018



Quantum dynamics of thermalizing systems

2018-01-16T10:00:00+00:00

Author(s): Christopher David White, Michael Zaletel, Roger S. K. Mong, and Gil Refael

We introduce a method “DMT” for approximating density operators of 1D systems that, when combined with a standard framework for time evolution (TEBD), makes possible simulation of the dynamics of strongly thermalizing systems to arbitrary times. We demonstrate that the method performs well for both ...


[Phys. Rev. B 97, 035127] Published Tue Jan 16, 2018



Identifying the perfect absorption of metamaterial absorbers

2018-01-16T10:00:00+00:00

Author(s): G. Duan, J. Schalch, X. Zhao, J. Zhang, R. D. Averitt, and X. Zhang

We present a detailed analysis of the conditions that result in unity absorption in metamaterial absorbers to guide the design and optimization of this important class of functional electromagnetic composites. Multilayer absorbers consisting of a metamaterial layer, dielectric spacer, and ground pla...


[Phys. Rev. B 97, 035128] Published Tue Jan 16, 2018



Generalized eigenstate typicality in translation-invariant quasifree fermionic models

2018-01-16T10:00:00+00:00

Author(s): Jonathon Riddell and Markus P. Müller

We demonstrate a generalized notion of eigenstate thermalization for translation-invariant quasifree fermionic models: the vast majority of eigenstates satisfying a finite number of suitable constraints (e.g., fixed energy and particle number) have the property that their reduced density matrix on s...


[Phys. Rev. B 97, 035129] Published Tue Jan 16, 2018



Single magnetic impurity in tilted Dirac surface states

2018-01-16T10:00:00+00:00

Author(s): Jin-Hua Sun, Lu-Ji Wang, Xing-Tai Hu, Lin Li, and Dong-Hui Xu

We utilize variational method to investigate the Kondo screening of a spin-1/2 magnetic impurity in tilted Dirac surface states with the Dirac cone tilted along the ${k}_{y}$ axis. We mainly study about the effect of the tilting term on the binding energy and the spin-spin correlation between magnet...


[Phys. Rev. B 97, 035130] Published Tue Jan 16, 2018



Algebraic charge dynamics of the quantum spin liquid ${β}^{′}−{\mathbf{EtMe}}_{3}\mathbf{Sb}{[\mathbf{Pd}{(\mathbf{dmit})}_{2}]}_{2}$

2018-01-16T10:00:00+00:00

Author(s): Shigeki Fujiyama and Reizo Kato

Nuclear spin-lattice ($1/{T}_{1}$) and spin-spin ($1/{T}_{2}$) relaxation rates of the cation sites of a candidate quantum spin-liquid ${β}^{′}−{\mathrm{EtMe}}_{3}\mathrm{Sb}{[\mathrm{Pd}{(\mathrm{dmit})}_{2}]}_{2}$ and its deuterated sample are presented. The enhanced $1/{T}_{1}$ of $^{1}\mathrm{H}...


[Phys. Rev. B 97, 035131] Published Tue Jan 16, 2018



Possible origin of linear magnetoresistance: Observation of Dirac surface states in layered ${\mathrm{PtBi}}_{2}$

2018-01-16T10:00:00+00:00

Author(s): S. Thirupathaiah, Y. Kushnirenko, E. Haubold, A. V. Fedorov, E. D. L. Rienks, T. K. Kim, A. N. Yaresko, C. G. F. Blum, S. Aswartham, B. Büchner, and S. V. Borisenko

The nonmagnetic compounds showing extremely large magnetoresistance are attracting a great deal of research interest due to their potential applications in the field of spintronics. ${\mathrm{PtBi}}_{2}$ is one of such interesting compounds showing large linear magnetoresistance (MR) in both the hex...


[Phys. Rev. B 97, 035133] Published Tue Jan 16, 2018



Three-dimensional electronic structure of the nematic and antiferromagnetic phases of NaFeAs from detwinned angle-resolved photoemission spectroscopy

2018-01-16T10:00:00+00:00

Author(s): Matthew D. Watson, Saicharan Aswartham, Luke C. Rhodes, Benjamin Parrett, Hideaki Iwasawa, Moritz Hoesch, Igor Morozov, Bernd Büchner, and Timur K. Kim

We report a comprehensive angle-resolved photoemission spectroscopy study of NaFeAs, a prototypical parent compound of the Fe-based superconductors. By mechanically detwinning the samples, we show that in the nematic phase (below the structural transition at ${T}_{s}=54$ K but above the antiferromag...


[Phys. Rev. B 97, 035134] Published Tue Jan 16, 2018



Controlling competing orders via nonequilibrium acoustic phonons: Emergence of anisotropic effective electronic temperature

2018-01-16T10:00:00+00:00

Author(s): Michael Schütt, Peter P. Orth, Alex Levchenko, and Rafael M. Fernandes

Ultrafast perturbations offer a unique tool to manipulate correlated systems due to their ability to promote transient behaviors with no equilibrium counterpart. A widely employed strategy is the excitation of coherent optical phonons, as they can cause significant changes in the electronic structur...


[Phys. Rev. B 97, 035135] Published Tue Jan 16, 2018



Transport properties of Rashba conducting strips coupled to magnetic moments with spiral order

2018-01-16T10:00:00+00:00

Author(s): José A. Riera

The magnetic and transport properties of a conducting layer with Rashba spin-orbit coupling (RSOC) magnetically coupled to a layer of localized magnetic moments are studied on strips of varying width. The localized moments are free to rotate and they acquire an order that results from the competitio...


[Phys. Rev. B 97, 035136] Published Tue Jan 16, 2018



Cumulant Green's function calculations of plasmon satellites in bulk sodium: Influence of screening and the crystal environment

2018-01-16T10:00:00+00:00

Author(s): Jianqiang Sky Zhou, Matteo Gatti, J. J. Kas, J. J. Rehr, and Lucia Reining

We present ab initio calculations of the photoemission spectra of bulk sodium using different flavors of the cumulant expansion approximation for the Green's function. In particular, we study the dispersion and intensity of the plasmon satellites. We show that the satellite spectrum is much more sen...


[Phys. Rev. B 97, 035137] Published Tue Jan 16, 2018



Band connectivity for topological quantum chemistry: Band structures as a graph theory problem

2018-01-16T10:00:00+00:00

Author(s): Barry Bradlyn, L. Elcoro, M. G. Vergniory, Jennifer Cano, Zhijun Wang, C. Felser, M. I. Aroyo, and B. Andrei Bernevig

The conventional theory of solids is well suited to describing band structures locally near isolated points in momentum space, but struggles to capture the full, global picture necessary for understanding topological phenomena. In part of a recent paper [B. Bradlyn et al., Nature (London) 547, 298 ...


[Phys. Rev. B 97, 035138] Published Tue Jan 16, 2018



Building blocks of topological quantum chemistry: Elementary band representations

2018-01-16T10:00:00+00:00

Author(s): Jennifer Cano, Barry Bradlyn, Zhijun Wang, L. Elcoro, M. G. Vergniory, C. Felser, M. I. Aroyo, and B. Andrei Bernevig

The link between chemical orbitals described by local degrees of freedom and band theory, which is defined in momentum space, was proposed by Zak several decades ago for spinless systems with and without time reversal in his theory of “elementary” band representations. In a recent paper [Bradlyn et...


[Phys. Rev. B 97, 035139] Published Tue Jan 16, 2018



Analog Sauter-Schwinger effect in semiconductors for spacetime-dependent fields

2018-01-16T10:00:00+00:00

Author(s): Malte F. Linder, Axel Lorke, and Ralf Schützhold

The Sauter-Schwinger effect predicts the creation of electron-positron pairs out of the quantum vacuum via tunneling induced by a strong electric field. Unfortunately, as the required field strength is extremely large, this fundamental prediction of quantum field theory has not been verified experim...


[Phys. Rev. B 97, 035203] Published Tue Jan 16, 2018



Probing electron-phonon interactions in the charge-photon dynamics of cavity-coupled double quantum dots

2018-01-16T10:00:00+00:00

Author(s): M. J. Gullans, J. M. Taylor, and J. R. Petta

Electron-phonon coupling is known to play an important role in the charge dynamics of semiconductor quantum dots. Here we explore its role in the combined charge-photon dynamics of cavity-coupled double quantum dots. Previous work on these systems has shown that strong electron-phonon coupling leads...


[Phys. Rev. B 97, 035305] Published Tue Jan 16, 2018



Perfect transmission at oblique incidence by trigonal warping in graphene P-N junctions

2018-01-16T10:00:00+00:00

Author(s): Shu-Hui Zhang and Wen Yang

We develop an analytical mode-matching technique for the tight-binding model to describe electron transport across graphene P-N junctions. This method shares the simplicity of the conventional mode-matching technique for the low-energy continuum model and the accuracy of the tight-binding model over...


[Phys. Rev. B 97, 035420] Published Tue Jan 16, 2018



Phonon hydrodynamics for nanoscale heat transport at ordinary temperatures

2018-01-16T10:00:00+00:00

Author(s): Yangyu Guo and Moran Wang

The classical Fourier's law fails in extremely small and ultrafast heat conduction even at ordinary temperatures due to strong thermodynamic nonequilibrium effects. In this work, a macroscopic phonon hydrodynamic equation beyond Fourier's law with a relaxation term and nonlocal terms is derived thro...


[Phys. Rev. B 97, 035421] Published Tue Jan 16, 2018



Steady-state Hall response and quantum geometry of driven-dissipative lattices

2018-01-16T10:00:00+00:00

Author(s): Tomoki Ozawa

We study the effects of the quantum geometric tensor, i.e., the Berry curvature and the Fubini-Study metric, on the steady state of driven-dissipative bosonic lattices. We show that the quantum-Hall-type response of the steady-state wave function in the presence of an external potential gradient dep...


[Phys. Rev. B 97, 041108(R)] Published Tue Jan 16, 2018



Landau levels with magnetic tunneling in a Weyl semimetal and magnetoconductance of a ballistic $p\text{−}n$ junction

2018-01-16T10:00:00+00:00

Author(s): D. R. Saykin, K. S. Tikhonov, and Ya. I. Rodionov

We study the Landau levels (LLs) of a Weyl semimetal with two adjacent Weyl nodes. We consider different orientations $η=∠(\mathbf{B},{\mathbf{k}}_{0})$ of magnetic field $\mathbf{B}$ with respect to ${\mathbf{k}}_{0}$, the vector of Weyl node splitting. A magnetic field facilitates the tunneling be...


[Phys. Rev. B 97, 041202(R)] Published Tue Jan 16, 2018



Spin filtering via resonant reflection of relativistic surface states

2018-01-16T10:00:00+00:00

Author(s): I. A. Nechaev and E. E. Krasovskii

A microscopic approach is developed to the scattering of surface states from a nonmagnetic linear defect at a surface with strong spin-orbit interaction. Spin-selective reflection resonances in scattering of Rashba-split surface states by an atomic stripe are theoretically discovered in a proof-of-p...


[Phys. Rev. B 97, 041407(R)] Published Tue Jan 16, 2018



Signatures of electronic nematicity in (111) ${\mathbf{LaAlO}}_{\mathbf{3}}/{\mathbf{SrTiO}}_{\mathbf{3}}$ interfaces

2018-01-16T10:00:00+00:00

Author(s): S. Davis, Z. Huang, K. Han, Ariando, T. Venkatesan, and V. Chandrasekhar

The two-dimensional conducting gas (2DCG) that forms at the interface between ${\mathrm{LaAlO}}_{3}$ (LAO) and ${\mathrm{SrTiO}}_{3}$ (STO) has been widely studied due to the multitude of in situ tunable phenomena that exist at the interface. Recently it has been shown that nearly every property of ...


[Phys. Rev. B 97, 041408(R)] Published Tue Jan 16, 2018



Breakdown of single spin-fluid model in the heavily hole-doped superconductor ${\mathrm{CsFe}}_{2}{\mathrm{As}}_{2}$

2018-01-16T10:00:00+00:00

Author(s): D. Zhao, S. J. Li, N. Z. Wang, J. Li, D. W. Song, L. X. Zheng, L. P. Nie, X. G. Luo, T. Wu, and X. H. Chen

Although Fe-based superconductors are correlated electronic systems with multiorbital, previous nuclear magnetic resonance (NMR) measurement suggests that a single spin-fluid model is sufficient to describe its spin behavior. Here, we first observed the breakdown of single spin-fluid model in a heav...


[Phys. Rev. B 97, 045118] Published Tue Jan 16, 2018



Sequential structural and antiferromagnetic transitions in ${\mathrm{BaFe}}_{2}{\mathrm{Se}}_{3}$ under pressure

2018-01-16T10:00:00+00:00

Author(s): Yang Zhang, Ling-Fang Lin, Jun-Jie Zhang, Elbio Dagotto, and Shuai Dong

The discovery of superconductivity in the two-leg ladder compound ${\mathrm{BaFe}}_{2}{\mathrm{S}}_{3}$ has established the 123-type iron chalcogenides as a novel and interesting subgroup of the iron-based superconductor family. However, in this 123 series, ${\mathrm{BaFe}}_{2}{\mathrm{Se}}_{3}$ is ...


[Phys. Rev. B 97, 045119] Published Tue Jan 16, 2018



Topological flat Wannier-Stark bands

2018-01-16T10:00:00+00:00

Author(s): A. R. Kolovsky, A. Ramachandran, and S. Flach

We analyze the spectrum and eigenstates of a quantum particle in a bipartite two-dimensional tight-binding dice network. In the absence of a dc bias, it hosts a chiral flatband with compact localized eigenstates. In the presence of a dc bias, the energy spectrum consists of a periodic repetition of ...


[Phys. Rev. B 97, 045120] Published Tue Jan 16, 2018



Ab initio study of the Coulomb interaction in ${\mathrm{Nb}}_{x}\mathrm{Co}$ clusters: Strong on-site versus weak nonlocal screening

2018-01-16T10:00:00+00:00

Author(s): L. Peters, E. Şaşıoğlu, I. Mertig, and M. I. Katsnelson

By means of ab initio calculations in conjunction with the random-phase approximation (RPA) within the full-potential linearized augmented plane wave method, we study the screening of the Coulomb interaction in ${\mathrm{Nb}}_{x}\mathrm{Co}$ ($1≤x≤9$) clusters. In addition, these results are compare...


[Phys. Rev. B 97, 045121] Published Tue Jan 16, 2018



Probing the ionic dielectric constant contribution in the ferroelectric phase of the Fabre salts

2018-01-16T10:00:00+00:00

Author(s): Mariano de Souza, Lucas Squillante, Cesar Sônego, Paulo Menegasso, Pascale Foury-Leylekian, and Jean-Paul Pouget

In strongly correlated organic materials it has been pointed out that charge ordering could also achieve electronic ferroelectricity at the same critical temperature ${T}_{co}$. A prototype of such phenomenon are the quasi-one-dimensional $({\mathrm{TMTTF})}_{2}X$ Fabre salts. However, the stabiliza...


[Phys. Rev. B 97, 045122] Published Tue Jan 16, 2018