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Preview: Recent Articles in Phys. Rev. B

Recent Articles in Phys. Rev. B



Recent articles in Physical Review B



Published: 2017-05-25T09:01:58-04:00

 



Temperature changes of the Fe_{8} molecular magnet during its spin reversal process

2017-05-24T10:00:00-04:00

Author(s): Maayan Yaari and Amit Keren
Tunneling of the spins in the Fe_{8} molecular magnet from a metastable ground state to an excited state is accompanied by a decay of these spins to the global ground state and an increase of the crystal temperature. We measured this temperature using two thermometers, one strongly coupled and the o…
[Phys. Rev. B 95, 174435] Published Wed May 24, 2017



Majorana STM as a perfect detector of odd-frequency superconductivity

2017-05-24T10:00:00-04:00

Author(s): Oleksiy Kashuba, Björn Sothmann, Pablo Burset, and Björn Trauzettel
We propose a novel scanning tunneling microscope (STM) device in which the tunneling tip is formed by a Majorana bound state (MBS). This peculiar bound state emerges at the boundary of a one-dimensional topological superconductor. Since the MBS has to be effectively spinless and local, we argue that…
[Phys. Rev. B 95, 174516] Published Wed May 24, 2017



Fractional Josephson effect in nonuniformly strained graphene

2017-05-24T10:00:00-04:00

Author(s): Shu-Ping Lee, Debaleena Nandi, Frank Marsiglio, and Joseph Maciejko
Nonuniform strain distributions in a graphene lattice can give rise to uniform pseudomagnetic fields and associated pseudo-Landau levels without breaking time-reversal symmetry. We demonstrate that by inducing superconductivity in a nonuniformly strained graphene sheet, the lowest pseudo-Landau leve…
[Phys. Rev. B 95, 174517] Published Wed May 24, 2017



Erratum: Strongly three-dimensional electronic structure and Fermi surfaces of SrFe_{2} (As_{0.65} P_{0.35} )_{2} : Comparison with BaFe_{2} (As_{1−x} P_{x} )_{2} [Phys. Rev. B 89, 184513 (2014)]

2017-05-24T10:00:00-04:00

Author(s): H. Suzuki, T. Kobayashi, S. Miyasaka, T. Yoshida, K. Okazaki, L. C. C. Ambolode, II, S. Ideta, M. Yi, M. Hashimoto, D. H. Lu, Z.-X. Shen, K. Ono, H. Kumigashira, S. Tajima, and A. Fujimori

[Phys. Rev. B 95, 179901] Published Wed May 24, 2017



Spin analogs of superconductivity and integer quantum Hall effect in an array of spin chains

2017-05-24T10:00:00-04:00

Author(s): Daniel Hill, Se Kwon Kim, and Yaroslav Tserkovnyak
Motivated by the successful idea of using weakly coupled quantum electronic wires to realize the quantum Hall effects and the quantum spin Hall effects, we theoretically study two systems composed of weakly coupled quantum spin chains within the mean-field approximations, which can exhibit spin anal…
[Phys. Rev. B 95, 180405(R)] Published Wed May 24, 2017



Structural and thermal effects of ion-irradiation induced defect configurations in silicon

2017-05-24T10:00:00-04:00

Author(s): Krishnan Swaminathan-Gopalan, Taishan Zhu, Elif Ertekin, and Kelly A. Stephani
Classical molecular dynamics calculations were used to investigate the formation of defects produced during irradiation of energetic ions on silicon. The aim of this study was to characterize the nature of defects and defective regions formed through ion irradiation and to establish a connection bet…
[Phys. Rev. B 95, 184109] Published Wed May 24, 2017



Spontaneous finite momentum pairing in superconductors without inversion symmetry

2017-05-24T10:00:00-04:00

Author(s): Aviram Steinbok and Karen Michaeli
We analyze the effect of magnetic fluctuations in superconductors with strong spin-orbit coupling and show that they drive a phase transition between two superconducting states: a conventional phase with zero center-of-mass momentum of Cooper pairs, and an exotic phase with nonzero pair momentum. Th…
[Phys. Rev. B 95, 184515] Published Wed May 24, 2017



Calculation of magnetic properties of metals by means of the magnetic-field-containing relativistic tight-binding approximation method

2017-05-24T10:00:00-04:00

Author(s): Masahiko Higuchi, Dipendra Bahadur Hamal, and Katsuhiko Higuchi
Magnetic properties of metals are investigated through electronic structure calculations based on the recently proposed magnetic-field-containing relativistic tight-binding approximation (MFRTB) method [Phys. Rev. B 91, 075122 (2015)]. It is found that electronic energy bands for a metal immersed in…
[Phys. Rev. B 95, 195153] Published Wed May 24, 2017



Gradient optimization of finite projected entangled pair states

2017-05-24T10:00:00-04:00

Author(s): Wen-Yuan Liu, Shao-Jun Dong, Yong-Jian Han, Guang-Can Guo, and Lixin He
Projected entangled pair states (PEPS) methods have been proven to be powerful tools to solve strongly correlated quantum many-body problems in two dimensions. However, due to the high computational scaling with the virtual bond dimension D, in a practical application, PEPS are often limited to rath…
[Phys. Rev. B 95, 195154] Published Wed May 24, 2017



Adsorption and desorption of hydrogen at nonpolar GaN(11 [over ¯] 00) surfaces: Kinetics and impact on surface vibrational and electronic properties

2017-05-24T10:00:00-04:00

Author(s): L. Lymperakis, J. Neugebauer, M. Himmerlich, S. Krischok, M. Rink, J. Kröger, and V. M. Polyakov
The adsorption of hydrogen at nonpolar GaN(11[over ¯]00) surfaces and its impact on the electronic and vibrational properties is investigated using surface electron spectroscopy in combination with density functional theory (DFT) calculations. For the surface mediated dissociation of H_{2} and the s…
[Phys. Rev. B 95, 195314] Published Wed May 24, 2017



Quantum treatment of phonon scattering for modeling of three-dimensional atomistic transport

2017-05-24T10:00:00-04:00

Author(s): Y. Lee, M. Bescond, N. Cavassilas, D. Logoteta, L. Raymond, M. Lannoo, and M. Luisier
Based on the nonequilibrium Green's function formalism, we show a numerically efficient method to treat inelastic scattering in multidimensional atomistic codes. Using a simple rescaling approach, we detail the calculations of the lowest-order approximation (LOA) [Y. Lee et al., Phys. Rev. B 93, 205…
[Phys. Rev. B 95, 201412(R)] Published Wed May 24, 2017



Evidence for strong enhancement of the magnetic ordering temperature of trivalent Nd metal under extreme pressure

2017-05-24T10:00:00-04:00

Author(s): J. Song, W. Bi, D. Haskel, and J. S. Schilling
Four-point electrical resistivity measurements were carried out on Nd metal and dilute magnetic alloys containing up to 1 at.% Nd in superconducting Y for temperatures 1.5–295 K under pressures to 210 GPa. The magnetic ordering temperature T_{o} of Nd appears to rise steeply under pressure, increasi…
[Phys. Rev. B 95, 205138] Published Wed May 24, 2017



Double resonant plasmonic nanoantennas for efficient second harmonic generation in zinc oxide

2017-05-24T10:00:00-04:00

Author(s): Nils Weber, Maximilian Protte, Felicitas Walter, Philip Georgi, Thomas Zentgraf, and Cedrik Meier
We demonstrate the efficient generation of second harmonic light in zinc oxide (ZnO) by utilizing double resonant plasmonic nanoantenna arrays. The antenna design is based on two gold dipole rods with plasmonic resonances at ω and 2ω, enabling strong localization of light at the fundamental frequenc…
[Phys. Rev. B 95, 205307] Published Wed May 24, 2017



Observation of acoustic valley vortex states and valley-chirality locked beam splitting

2017-05-23T10:00:00-04:00

Author(s): Liping Ye, Chunyin Qiu, Jiuyang Lu, Xinhua Wen, Yuanyuan Shen, Manzhu Ke, Fan Zhang, and Zhengyou Liu

As one of the most common waves in daily life, scalar sound is not easy to control by external fields since it lacks the intrinsic degrees of freedom such as the charge and spin in electrons. Here, the authors present an experimental observation of acoustic vortex states in sonic crystals, where the vortex chirality forms a good carrier of information for sound. By selectively exciting such novel states, they have fabricated a lattice array of sound vortices, and controlled the vortex chirality according to the operating frequency or incident direction of external sound. Furthermore, a peculiar beam-splitting behavior is observed, where the two spatially separated sound beams carry opposite vortex chirality, as manifested in the image here.

(image)
[Phys. Rev. B 95, 174106] Published Tue May 23, 2017



Quenches from bosonic Gaussian initial states to the Tonks-Girardeau limit: Stationary states and effects of a confining potential

2017-05-23T10:00:00-04:00

Author(s): Alvise Bastianello, Mario Collura, and Spyros Sotiriadis
We consider the general problem of quenching an interacting Bose gas from the noninteracting regime to the strongly repulsive limit described by the Tonks-Girardeau gas with the initial state being a Gaussian ensemble in terms of the bosons. A generic multipoint correlation function in the steady st…
[Phys. Rev. B 95, 174303] Published Tue May 23, 2017



Enhanced ferroelectric polarization in epitaxial (Pb_{1−x} La_{x} )(Zr_{0.52} Ti_{0.48} )O_{3} thin films due to low La doping

2017-05-23T10:00:00-04:00

Author(s): Devajyoti Mukherjee, Mahesh Hordagoda, David Pesquera, Dipankar Ghosh, Jacob L. Jones, Pritish Mukherejee, and Sarath Witanachchi
Enhanced polarization is reported in ferroelectric (Pb_{1−x}La_{x})(Zr_{0.52}Ti_{0.48})O_{3} (PLZT) thin films at low La doping concentrations. Epitaxial PLZT thin films with varying La concentrations were grown in both (001) and (111) crystallographic orientations using the conducting perovskite ox…
[Phys. Rev. B 95, 174304] Published Tue May 23, 2017



Combined impact of strain and stoichiometry on the structural and ferroelectric properties of epitaxially grown Na_{1+x} NbO_{3+δ} films on (110) NdGaO_{3}

2017-05-23T10:00:00-04:00

Author(s): Biya Cai, J. Schwarzkopf, C. Feldt, J. Sellmann, T. Markurt, and R. Wördenweber
We demonstrate that the strain of an epitaxially grown film, which is induced by the lattice mismatch between the crystalline substrate and film and relaxes with increasing film thickness, can be conserved beyond the critical thickness of plastic relaxation of the respective film/substrate heterostr…
[Phys. Rev. B 95, 184108] Published Tue May 23, 2017



Critical behavior of the two-dimensional Coulomb glass at zero temperature

2017-05-23T10:00:00-04:00

Author(s): Preeti Bhandari, Vikas Malik, and Syed Rashid Ahmad
The lattice model of the Coulomb glass in two dimensions with box-type random field distribution is studied at zero temperature for system size up to 96^{2}. To obtain the minimum energy state we annealed the system using Monte Carlo simulation followed by further minimization using cluster flipping…
[Phys. Rev. B 95, 184203] Published Tue May 23, 2017



High-pressure magnetic, electronic, and structural properties of MFe_{2} O_{4} (M=Mg,Zn,Fe) ferric spinels

2017-05-23T10:00:00-04:00

Author(s): E. Greenberg, W. M. Xu, M. Nikolaevsky, E. Bykova, G. Garbarino, K. Glazyrin, D. G. Merkel, L. Dubrovinsky, M. P. Pasternak, and G. Kh. Rozenberg
Magnetic, electronic, and structural properties of MFe_{2}O_{4} (M=Mg,Zn,Fe) ferric spinels have been studied by ^{57}Fe Mössbauer spectroscopy, electrical conductivity, and powder and single-crystal x-ray diffraction (XRD) to a pressure of 120 GPa and in the 2.4–300 K temperature range. These studi…
[Phys. Rev. B 95, 195150] Published Tue May 23, 2017



Electronic correlation effects and Coulomb gap in the Si(111)-( sqrt[3] × sqrt[3] )-Sn surface

2017-05-23T10:00:00-04:00

Author(s): A. B. Odobescu, A. A. Maizlakh, N. I. Fedotov, and S. V. Zaitsev-Zotov
The electronic transport properties of the Si(111)-(sqrt[3]×sqrt[3])-Sn surface formed on the low-doped Si substrates are studied using two-probe conductivity measurements and tunneling spectroscopy. We demonstrate that the ground state corresponds to a Mott-Hubbard insulator with a band gap of 2Δ≈7…
[Phys. Rev. B 95, 195151] Published Tue May 23, 2017



Holographic dynamics from multiscale entanglement renormalization ansatz

2017-05-23T10:00:00-04:00

Author(s): Victor Chua, Vasilios Passias, Apoorv Tiwari, and Shinsei Ryu
The multiscale entanglement renormalization ansatz (MERA) is a tensor network based variational ansatz that is capable of capturing many of the key physical properties of strongly correlated ground states such as criticality and topological order. MERA also shares many deep relationships with the Ad…
[Phys. Rev. B 95, 195152] Published Tue May 23, 2017



Nonexponential spin decay in a quantum kinetic description of the D'yakonov-Perel' mechanism mediated by impurity scattering

2017-05-23T10:00:00-04:00

Author(s): M. Cosacchi, M. Cygorek, F. Ungar, and V. M. Axt
The electron spin dynamics in an optically excited narrow quantum well is studied, where the electron spins precess in a k-dependent magnetic field, while the electrons scatter at localized impurities. For the resulting spin decay, which is commonly known as the D'yakonov-Perel' mechansim, analytica…
[Phys. Rev. B 95, 195313] Published Tue May 23, 2017



Observation of bound and antibound states of two excitons in GaAs single quantum well by two-dimensional coherent spectroscopy

2017-05-23T10:00:00-04:00

Author(s): Y. Ogawa
We study the bound and antibound states of two excitons in a GaAs single quantum well by two-dimensional coherent spectroscopy. We also propose a method to directly observe the amplitude and phase (real and imaginary parts) of optical fields by using a heterodyne interference technique and through s…
[Phys. Rev. B 95, 201113(R)] Published Tue May 23, 2017



Precise measurements of the dipole moment and polarizability of the neutral exciton and positive trion in a single quantum dot

2017-05-23T10:00:00-04:00

Author(s): J. D. Mar, J. J. Baumberg, X. L. Xu, A. C. Irvine, and D. A. Williams
We perform precise measurements of the permanent dipole moment and polarizability of both the neutral exciton (X^{0}) and positive trion (X^{+}) in a single InAs/GaAs self-assembled quantum dot (QD). This is achieved through one- and two-color high-resolution photocurrent (PC) spectroscopy of X^{0} …
[Phys. Rev. B 95, 201304(R)] Published Tue May 23, 2017



Generating indistinguishable photons from a quantum dot in a noisy environment

2017-05-23T10:00:00-04:00

Author(s): Ted S. Santana, Yong Ma, Ralph N. E. Malein, Faebian Bastiman, Edmund Clarke, and Brian D. Gerardot
Single photons from semiconductor quantum dots are promising resources for linear optical quantum computing, or, when coupled to spin states, quantum repeaters. To realize such schemes, the photons must exhibit a high degree of indistinguishability. However, the solid-state environment presents inhe…
[Phys. Rev. B 95, 201410(R)] Published Tue May 23, 2017



Dynamical quantum anomalous Hall effect in strong optical fields

2017-05-23T10:00:00-04:00

Author(s): Woo-Ram Lee and Wang-Kong Tse
Topological insulators are characterized by the quantum anomalous Hall effect (QAHE) on the topological surface states under time-reversal symmetry breaking. Motivated by recent experiments on the magneto-optical effects induced by the QAHE, we develop a theory for the dynamical Hall conductivity fo…
[Phys. Rev. B 95, 201411(R)] Published Tue May 23, 2017



Duality and bosonization of (2+1)-dimensional Majorana fermions

2017-05-23T10:00:00-04:00

Author(s): Max A. Metlitski, Ashvin Vishwanath, and Cenke Xu
We construct a dual-bosonized description of a massless Majorana fermion in (2+1)d. In contrast to Dirac fermions, for which a bosonized description can be constructed using a flux attachment procedure, neutral Majorana fermions call for a different approach.We argue that the dual theory is an SO(N)…
[Phys. Rev. B 95, 205137] Published Tue May 23, 2017



Semiclassical theory of anisotropic transport at LaAlO_{3} /SrTiO_{3} interfaces under an in-plane magnetic field

2017-05-23T10:00:00-04:00

Author(s): N. Bovenzi and M. Diez
The unconventional magnetotransport at the interface between transition-metal oxides LaAlO_{3} (LAO) and SrTiO_{3} (STO) is frequently related to mobile electrons interacting with localized magnetic moments. However, nature and properties of magnetism at this interface are not well understood so far…
[Phys. Rev. B 95, 205430] Published Tue May 23, 2017



Switchable valley filter based on a graphene p−n junction in a magnetic field

2017-05-23T10:00:00-04:00

Author(s): T. Sekera, C. Bruder, E. J. Mele, and R. P. Tiwari
Low-energy excitations in graphene exhibit relativistic properties due to the linear dispersion relation close to the Dirac points in the first Brillouin zone. Two of the Dirac points located at opposite corners of the first Brillouin zone can be chosen as inequivalent, representing a new valley deg…
[Phys. Rev. B 95, 205431] Published Tue May 23, 2017



Magnetic structure of the magnetoelectric material Ca_{2} CoSi_{2} O_{7}

2017-05-22T10:00:00-04:00

Author(s): A. Sazonov, V. Hutanu, M. Meven, G. Roth, H. Murakawa, Y. Tokura, V. K. Guduru, L. C. J. M. Peters, U. Zeitler, L. F. Kiss, D. Szaller, B. Náfrádi, and I. Kézsmárki
Detailed investigation of Ca_{2}CoSi_{2}O_{7} was performed in its low-temperature magnetoelectric state combining neutron diffraction with magnetization measurements on single crystals. The crystal and magnetic structures well below the antiferromagnetic transition temperature of T_{N}≈5.7 K were d…
[Phys. Rev. B 95, 174431] Published Mon May 22, 2017



First-principles modeling of the Invar effect in Fe_{65} Ni_{35} by the spin-wave method

2017-05-22T10:00:00-04:00

Author(s): A. V. Ruban
Thermal lattice expansion of the Invar Fe_{0.65}Ni_{0.35} alloy is investigated in first-principles calculations using the spin-wave method, which is generalized here for the ferromagnetic state with short-range order. It is shown that magnetic short-range order effects make a substantial contributi…
[Phys. Rev. B 95, 174432] Published Mon May 22, 2017



Anisotropic physical properties of single-crystal U_{2} Rh_{2} Sn in high magnetic fields

2017-05-22T10:00:00-04:00

Author(s): K. Prokeš, D. I. Gorbunov, M. Reehuis, B. Klemke, A. Gukasov, K. Uhlířová, X. Fabrèges, Y. Skourski, F. Yokaichiya, S. Hartwig, and A. V. Andreev
We report on the crystal and magnetic structures, magnetic, transport, and thermal properties of U_{2}Rh_{2}Sn single crystals studied in part in high magnetic fields up to 58 T. The material adopts a U_{3}Si_{2}-related tetragonal crystal structure and orders antiferromagnetically below T_{N}=25 K.…
[Phys. Rev. B 95, 174433] Published Mon May 22, 2017



Field-induced structural transition and irreversible domain detwinning in the antiferromagnet Fe_{1.1} Te

2017-05-22T10:00:00-04:00

Author(s): X. Fabrèges, F. Duc, T. Roth, W. Knafo, R. Viennois, and C. Detlefs
Single-crystal x-ray diffraction in pulsed magnetic fields of up to 31 T was used to investigate the iron telluride antiferromagnet Fe_{1.1}Te, which is a parent of the Fe-based chalcogenide superconductors. At temperatures below the Néel temperature T_{N}≃60 K, high magnetic fields perpendicular to…
[Phys. Rev. B 95, 174434] Published Mon May 22, 2017



Magnetic and thermodynamic properties of Cu_{x} TiSe_{2} single crystals

2017-05-22T10:00:00-04:00

Author(s): Z. Pribulová, Z. Medvecká, J. Kačmarčík, V. Komanický, T. Klein, P. Rodière, F. Levy-Bertrand, B. Michon, C. Marcenat, P. Husaníková, V. Cambel, J. Šoltýs, G. Karapetrov, S. Borisenko, D. Evtushinsky, H. Berger, and P. Samuely
We present a detailed study of the phase diagram of copper-intercalated TiSe_{2} single crystals, combining local Hall-probe magnetometry, tunnel diode oscillator technique (TDO), and specific-heat and angle-resolved photoemission spectroscopy measurements. A series of the Cu_{x}TiSe_{2} samples fro…
[Phys. Rev. B 95, 174512] Published Mon May 22, 2017



Tuning electronic properties of FeSe_{0.5} Te_{0.5} thin flakes using a solid ion conductor field-effect transistor

2017-05-22T10:00:00-04:00

Author(s): C. S. Zhu, J. H. Cui, B. Lei, N. Z. Wang, C. Shang, F. B. Meng, L. K. Ma, X. G. Luo, T. Wu, Z. Sun, and X. H. Chen
Using a field-effect transistor (FET) configuration with solid Li-ion conductor (SIC) as gate dielectric, we have successfully tuned carrier density in FeSe_{0.5}Te_{0.5} thin flakes, and the electronic phase diagram has been mapped out. It is found that electron doping controlled by SIC-FET leads t…
[Phys. Rev. B 95, 174513] Published Mon May 22, 2017



Manipulating Abrikosov vortices with soft magnetic stripes

2017-05-22T10:00:00-04:00

Author(s): V. K. Vlasko-Vlasov, F. Colauto, A. I. Buzdin, D. Rosenmann, T. Benseman, and W.-K. Kwok
Tuning the polarization of a periodic array of magnetic stripes on top of a superconducting film allows control of Abrikosov vortex motion. Using direct magneto-optical imaging of the vortex patterns, we demonstrate that the proximity of the magnetic stripe ends to the edges of the superconducting f…
[Phys. Rev. B 95, 174514] Published Mon May 22, 2017



Transport in superconductor–normal metal–superconductor tunneling structures: Spinful p-wave and spin-orbit-coupled topological wires

2017-05-22T10:00:00-04:00

Author(s): F. Setiawan, William S. Cole, Jay D. Sau, and S. Das Sarma
We theoretically study transport properties of voltage-biased one-dimensional superconductor–normal metal–superconductor tunnel junctions with arbitrary junction transparency where the superconductors can have trivial or nontrivial topology. Motivated by recent experimental efforts on Majorana prope…
[Phys. Rev. B 95, 174515] Published Mon May 22, 2017



Emergent Haldane phase in the S=1 bilinear-biquadratic Heisenberg model on the square lattice

2017-05-22T10:00:00-04:00

Author(s): Ido Niesen and Philippe Corboz
Infinite projected entangled pair states simulations of the S=1 bilinear-biquadratic Heisenberg model on the square lattice reveal an emergent Haldane phase in between the previously predicted antiferromagnetic and three-sublattice 120^{∘} magnetically ordered phases. This intermediate phase preserv…
[Phys. Rev. B 95, 180404(R)] Published Mon May 22, 2017



Thermal conductance of interfaces with amorphous SiO_{2} measured by time-resolved magneto-optic Kerr-effect thermometry

2017-05-22T10:00:00-04:00

Author(s): Judith Kimling, André Philippi-Kobs, Jonathan Jacobsohn, Hans Peter Oepen, and David G. Cahill
We use time-resolved magneto-optic Kerr effect and ultrathin Co/Pt transducer films to perform thermal-transport experiments with higher sensitivity and greater time resolution than typically available in studies of interfacial thermal transport by time-domain thermoreflectance. We measure the inter…
[Phys. Rev. B 95, 184305] Published Mon May 22, 2017



Current-driven skyrmion expulsion from magnetic nanostrips

2017-05-22T10:00:00-04:00

Author(s): Myoung-Woo Yoo, Vincent Cros, and Joo-Von Kim
We study the current-driven skyrmion expulsion from magnetic nanostrips using micromagnetic simulations and analytic calculations. We explore the threshold current density for the skyrmion expulsion, and show that this threshold is determined by the critical boundary force as well as the spin-torque…
[Phys. Rev. B 95, 184423] Published Mon May 22, 2017



Frustrated spin-1/2 molecular magnetism in the mixed-valence antiferromagnets Ba_{3} MRu_{2} O_{9} (M=In, Y, Lu)

2017-05-22T10:00:00-04:00

Author(s): D. Ziat, A. A. Aczel, R. Sinclair, Q. Chen, H. D. Zhou, T. J. Williams, M. B. Stone, A. Verrier, and J. A. Quilliam
We have performed magnetic susceptibility, heat capacity, muon spin relaxation, and neutron-scattering measurements on three members of the family Ba_{3}MRu_{2}O_{9}, where M=In, Y, and Lu. These systems consist of mixed-valence Ru dimers on a triangular lattice with antiferromagnetic interdimer exc…
[Phys. Rev. B 95, 184424] Published Mon May 22, 2017



Thermodynamics of the quantum spin liquid state of the single-component dimer Mott system κ−H_{3} (Cat−EDT−TTF)_{2}

2017-05-22T10:00:00-04:00

Author(s): Satoshi Yamashita, Yasuhiro Nakazawa, Akira Ueda, and Hatsumi Mori
Thermodynamic properties of the proton-mediated single component dimer-Mott insulator of κ−H_{3}(Cat−EDT−TTF)_{2}, which has a two-dimensional triangle lattice structure of S=1/2 spins, are reported. The extraordinary large electronic heat capacity coefficient γ=58.8mJK^{−2}mol^{−1} observed by the …
[Phys. Rev. B 95, 184425] Published Mon May 22, 2017



Magnetic-field-induced ordered phase in the chloro-bridged copper(II) dimer system [Cu_{2} (apyhist)_{2} Cl_{2} ](ClO_{4} )_{2}

2017-05-22T10:00:00-04:00

Author(s): R. S. Freitas, W. A. Alves, and A. Paduan-Filho
Specific heat and magnetization measurements of the compound [Cu_{2}(apyhist)_{2}Cl_{2}](ClO_{4})_{2}, where apyhist = (4-imidazolyl)ethylene-2-amino-1-ethylpyridine), were used to identify a magnetic-field-induced long-range antiferromagnetic ordered phase at low temperatures (T<0.36K) and magnetic fields (1.6
[Phys. Rev. B 95, 184426] Published Mon May 22, 2017



Universality and unconventional enhancement of flux-flow resistivity in Ba(Fe_{1−x} Co_{x} )_{2} As_{2}

2017-05-22T10:00:00-04:00

Author(s): X. Y. Huang, D. J. Haney, Y. P. Singh, T. Hu, H. Xiao, Hai-Hu Wen, M. Dzero, and C. C. Almasan
Measurements of the current-voltage characteristics (I−V) were performed on Ba(Fe_{1−x}Co_{x})_{2}As_{2} single crystals with doping level 0.044≤x≤0.100. An unconventional increase in the flux-flow resistivity ρ_{ff} with decreasing magnetic field H was observed across this doping range. Such an abn…
[Phys. Rev. B 95, 184513] Published Mon May 22, 2017



Superconductivity in noncentrosymmetric Ag_{2} Pd_{3} S

2017-05-22T10:00:00-04:00

Author(s): H. Yoshida, H. Okabe, Y. Matsushita, M. Isobe, and E. Takayama-Muromachi
We have successfully synthesized the single crystal of Ag_{2}Pd_{3}S, which exhibits superconductivity with the transition temperature of T_{c}=2.25K. Ag_{2}Pd_{3}S crystallizes in the space group P4_{1}32 with the filled β−Mn structure, which has no inversion symmetry. The value of the Ginzburg-Lan…
[Phys. Rev. B 95, 184514] Published Mon May 22, 2017



Effects of pressure and magnetic field on the reentrant superconductor Eu(Fe_{0.93} Rh_{0.07} )_{2} As_{2}

2017-05-22T10:00:00-04:00

Author(s): A. Löhle, A. Baumgartner, S. Zapf, M. Dressel, W. H. Jiao, and G. H. Cao
Electron-doped Eu(Fe_{0.93}Rh_{0.07})_{2}As_{2} has been systematically studied by high-pressure investigations of the magnetic and electrical transport properties in order to unravel the complex interplay of superconductivity and magnetism. The compound reveals an exceedingly broad reentrant transi…
[Phys. Rev. B 95, 195146] Published Mon May 22, 2017



Interacting fermionic symmetry-protected topological phases in two dimensions

2017-05-22T10:00:00-04:00

Author(s): Chenjie Wang, Chien-Hung Lin, and Zheng-Cheng Gu

Symmetry-protected topological (SPT) phases (e.g., the well known topological insulators) are a class of energetically gapped condensed matter systems that exhibit interesting topological properties only in the presence of certain global symmetries. While a great understanding of noninteracting fermionic SPT phases has been achieved recently, interacting SPT phases, in particular those that exist only in strongly interacting systems, are much less understood in general. Here, the authors study strongly interacting fermionic SPT phases in two spatial dimensions with finite Abelian unitary symmetries and provide a potentially complete classification of them.

(image)
[Phys. Rev. B 95, 195147] Published Mon May 22, 2017



Symmetric minimally entangled typical thermal states for canonical and grand-canonical ensembles

2017-05-22T10:00:00-04:00

Author(s): Moritz Binder and Thomas Barthel
Based on the density matrix renormalization group (DMRG), strongly correlated quantum many-body systems at finite temperatures can be simulated by sampling over a certain class of pure matrix product states (MPS) called minimally entangled typical thermal states (METTS). When a system features symme…
[Phys. Rev. B 95, 195148] Published Mon May 22, 2017



Modulated, three-directional, and polar structural instability in layered d^{1} NaTiO_{2}

2017-05-22T10:00:00-04:00

Author(s): Alaska Subedi
I study the experimentally observed structural phase transition in NaTiO_{2} using density functional calculations. I do not find the previously proposed low-temperature structure energetically favorable with respect to the high-temperature rhombohedral structure. The calculated phonon dispersions o…
[Phys. Rev. B 95, 195149] Published Mon May 22, 2017



Exciton mass increase in a GaAs/AlGaAs quantum well in a transverse magnetic field

2017-05-22T10:00:00-04:00

Author(s): S. Yu. Bodnar, P. S. Grigoryev, D. K. Loginov, V. G. Davydov, Yu. P. Efimov, S. A. Eliseev, V. A. Lovtcius, E. V. Ubyivovk, V. Yu. Mikhailovskii, and I. V. Ignatiev
In this work we have investigated the exciton reflectance spectra of a high quality heterostructure with a GaAs/AlGaAs quantum well in a transverse magnetic field (Voigt geometry). It has been shown that application of the magnetic field leads to a decrease of energy distance between spectral featur…
[Phys. Rev. B 95, 195311] Published Mon May 22, 2017



Trapping time of excitons in Si nanocrystals embedded in a SiO_{2} matrix

2017-05-22T10:00:00-04:00

Author(s): E. M. L. D. de Jong, W. D. A. M. de Boer, I. N. Yassievich, and T. Gregorkiewicz
Silicon (Si) nanocrystals (NCs) are of great interest for many applications, ranging from photovoltaics to optoelectonics. The photoluminescence quantum yield of Si NCs dispersed in SiO_{2} is limited, suggesting the existence of very efficient processes of nonradiative recombination, among which th…
[Phys. Rev. B 95, 195312] Published Mon May 22, 2017



Ab initio calculation of the G peak intensity of graphene: Laser-energy and Fermi-energy dependence and importance of quantum interference effects

2017-05-22T10:00:00-04:00

Author(s): Sven Reichardt and Ludger Wirtz
We present the results of a diagrammatic, fully ab initio calculation of the G peak intensity of graphene. The flexibility and generality of our approach enables us to go beyond the previous analytical calculations in the low-energy regime. We study the laser and Fermi energy dependence of the G pea…
[Phys. Rev. B 95, 195422] Published Mon May 22, 2017



Engineering and manipulating exciton wave packets

2017-05-22T10:00:00-04:00

Author(s): Xiaoning Zang, Simone Montangero, Lincoln D. Carr, and Mark T. Lusk
When a semiconductor absorbs light, the resulting electron-hole superposition amounts to a uncontrolled quantum ripple that eventually degenerates into diffusion. If the conformation of these excitonic superpositions could be engineered, though, they would constitute a new means of transporting info…
[Phys. Rev. B 95, 195423] Published Mon May 22, 2017



Superconductivity-induced ferromagnetism and Weyl superconductivity in Nb-doped Bi_{2} Se_{3}

2017-05-22T10:00:00-04:00

Author(s): Noah F. Q. Yuan, Wen-Yu He, and K. T. Law
A recent experiment on Nb-doped Bi_{2}Se_{3} showed that zero field magnetization appears below the superconducting transition temperature. This gives evidence that the superconducting state breaks time-reversal symmetry spontaneously and is possibly in the chiral topological phase. This is in sharp…
[Phys. Rev. B 95, 201109(R)] Published Mon May 22, 2017



Time-reversal and rotation symmetry breaking superconductivity in Dirac materials

2017-05-22T10:00:00-04:00

Author(s): Luca Chirolli, Fernando de Juan, and Francisco Guinea
We consider mixed symmetry superconducting phases in Dirac materials in the odd-parity channel, where pseudoscalar and vector order parameters can coexist due to their similar critical temperatures when attractive interactions are of a finite range. We show that the coupling of these order parameter…
[Phys. Rev. B 95, 201110(R)] Published Mon May 22, 2017



Dark modes and field enhancements in dielectric dimers illuminated by cylindrical vector beams

2017-05-22T10:00:00-04:00

Author(s): Tanya Das and Jon A. Schuller

Dielectric antennas possess a complex multipolar response comprising both electric and magnetic resonances. These various modes can be selectively enhanced or suppressed using illumination beams of varying symmetries. However, such demonstrations are currently limited to single-particle antennas. Here, the authors address this issue with a theoretical study of dielectric dimer antennas illuminated by cylindrical vector beams (CVBs). They excite and study hybridized multipolar resonances in both horizontal and vertical dimer systems and show how the different beam symmetries of CVBs can selectively excite electric and magnetic modes in vertical systems, as well as couple to dark multipolar modes. The authors design an antenna system that yields unprecedented magnetic field enhancement and establishes the dielectric dimer antenna as a useful test bed for further experimental investigation.

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[Phys. Rev. B 95, 201111(R)] Published Mon May 22, 2017



Ladder physics in the spin fermion model

2017-05-22T10:00:00-04:00

Author(s): A. M. Tsvelik
A link is established between the spin fermion (SF) model of the cuprates and the approach based on the analogy between the physics of doped Mott insulators in two dimensions and the physics of fermionic ladders. This enables one to use nonperturbative results derived for fermionic ladders to move b…
[Phys. Rev. B 95, 201112(R)] Published Mon May 22, 2017



Insulators and metals with topological order and discrete symmetry breaking

2017-05-22T10:00:00-04:00

Author(s): Shubhayu Chatterjee and Subir Sachdev
Numerous experiments have reported discrete symmetry breaking in the high-temperature pseudogap phase of the hole-doped cuprates, including breaking of one or more of lattice rotation, inversion, and time-reversal symmetries. In the absence of translational symmetry breaking or topological order, th…
[Phys. Rev. B 95, 205133] Published Mon May 22, 2017



Quantum oscillation studies of the topological semimetal candidate ZrGeM(M=S,Se,Te)

2017-05-22T10:00:00-04:00

Author(s): J. Hu, Y. L. Zhu, D. Graf, Z. J. Tang, J. Y. Liu, and Z. Q. Mao
The WHM-type materials (W=Zr/Hf/La, H=Si/Ge/Sn/Sb, M=O/S/Se/Te) have been predicted to be a large pool of topological materials. These materials allow for fine tuning of spin-orbit coupling, lattice constant, and structural dimensionality for various combinations of W, H, and M elements, thus provid…
[Phys. Rev. B 95, 205134] Published Mon May 22, 2017



Truncated Calogero-Sutherland models

2017-05-22T10:00:00-04:00

Author(s): S. M. Pittman, M. Beau, M. Olshanii, and A. del Campo
A one-dimensional quantum many-body system consisting of particles confined in a harmonic potential and subject to finite-range two-body and three-body inverse-square interactions is introduced. The range of the interactions is set by truncation beyond a number of neighbors and can be tuned to inter…
[Phys. Rev. B 95, 205135] Published Mon May 22, 2017



Assessment of long-range-corrected exchange-correlation kernels for solids: Accurate exciton binding energies via an empirically scaled bootstrap kernel

2017-05-22T10:00:00-04:00

Author(s): Young-Moo Byun and Carsten A. Ullrich
In time-dependent density-functional theory, a family of exchange-correlation kernels, known as long-range-corrected (LRC) kernels, have shown promise in the calculation of excitonic effects in solids. We perform a systematic assessment of existing static LRC kernels (empirical LRC, Bootstrap, and j…
[Phys. Rev. B 95, 205136] Published Mon May 22, 2017



Phonon thermal transport in transition-metal and rare-earth nitride semiconductors from first principles

2017-05-22T10:00:00-04:00

Author(s): Chunhua Li and David Broido
The thermal properties of three transition metal and rare-earth nitride compounds, ScN, YN, and LuN, have been studied using a first principles approach, in which a DFT+U treatment is guided by accurate hybrid functional calculations of electronic structure. The phonon dispersions for the three comp…
[Phys. Rev. B 95, 205203] Published Mon May 22, 2017



Aharonov-Bohm oscillations in phosphorene quantum rings

2017-05-22T10:00:00-04:00

Author(s): L. L. Li, D. Moldovan, P. Vasilopoulos, and F. M. Peeters
The Aharonov-Bohm (AB) effect in square phosphorene quantum rings, with armchair and zigzag edges, is investigated using the tight-binding method. The energy spectra and wave functions of such rings, obtained as a function of the magnetic flux Φ threading the ring, are strongly influenced by the rin…
[Phys. Rev. B 95, 205426] Published Mon May 22, 2017



Charging of highly resistive granular metal films

2017-05-22T10:00:00-04:00

Author(s): M. F. Orihuela, M. Ortuño, A. M. Somoza, J. Colchero, E. Palacios-Lidón, T. Grenet, and J. Delahaye
We have used the scanning Kelvin probe microscopy technique to monitor the charging process of highly resistive granular thin films. The sample is connected to two leads and is separated by an insulator layer from a gate electrode. When a gate voltage is applied, charges enter from the leads and rea…
[Phys. Rev. B 95, 205427] Published Mon May 22, 2017



Flexible thin metal crystals as focusing mirrors for neutral atomic beams

2017-05-22T10:00:00-04:00

Author(s): Gloria Anemone, Amjad Al Taleb, Sabrina D. Eder, Bodil Holst, and Daniel Farías
The development of novel reflective optical elements is essential to improve the focusing of neutral atomic beams. The recent availability of commercial thin crystals led to a renewed interest in curved mirrors as reflective elements for He microscopy. We have investigated the reflectivity to incomi…
[Phys. Rev. B 95, 205428] Published Mon May 22, 2017



Geometric and electronic structure of the Cs-doped Bi_{2} Se_{3} (0001) surface

2017-05-22T10:00:00-04:00

Author(s): M. M. Otrokov, A. Ernst, K. Mohseni, H. Fulara, S. Roy, G. R. Castro, J. Rubio-Zuazo, A. G. Ryabishchenkova, K. A. Kokh, O. E. Tereshchenko, Z. S. Aliev, M. B. Babanly, E. V. Chulkov, H. L. Meyerheim, and S. S. P. Parkin
Using surface x-ray diffraction and scanning tunneling microscopy in combination with first-principles calculations, we have studied the geometric and electronic structure of Cs-deposited Bi_{2}Se_{3}(0001) surface kept at room temperature. Two samples were investigated: a single Bi_{2}Se_{3} crysta…
[Phys. Rev. B 95, 205429] Published Mon May 22, 2017



Tipping the magnetic instability in paramagnetic Sr_{3} Ru_{2} O_{7} by Fe impurities

2017-05-19T10:00:00-04:00

Author(s): M. Zhu, Y. Wang, P. G. Li, J. J. Ge, W. Tian, D. Keavney, Z. Q. Mao, and X. Ke
We report the magnetic and electronic properties of the bilayer ruthenate Sr_{3}Ru_{2}O_{7} upon Fe substitution for Ru. We find that Sr_{3}(Ru_{1−x}Fe_{x})_{2}O_{7} shows a spin-glass-like phase below 4 K for x=0.01 and commensurate E-type antiferromagnetically ordered insulating ground state chara…
[Phys. Rev. B 95, 174430] Published Fri May 19, 2017



Weak phonon-mediated pairing in BiS_{2} superconductor from first principles

2017-05-19T10:00:00-04:00

Author(s): Corentin Morice, Ryosuke Akashi, Takashi Koretsune, Siddharth S. Saxena, and Ryotaro Arita
Superconductivity in novel bismuth-sulfur superconductors has attracted large research efforts, both experimental and theoretical, but a consensus on the nature of superconductivity in these materials has yet to be reached. Using density functional theory for superconductors, we study the electron-p…
[Phys. Rev. B 95, 180505(R)] Published Fri May 19, 2017



Coexistence of G- and C-type orbital ordered phases and its correlation with magnetization reversal in YVO_{3}

2017-05-19T10:00:00-04:00

Author(s): Rana Saha, Francois Fauth, Vincent Caignaert, and A. Sundaresan
It is known that the orbital disordered orthorhombic (Pnma) perovskite, YVO_{3}, undergoes a transition to the G-type orbital ordered monoclinic phase (P112_{1}/a) at T_{G−OO}∼200K followed by a first-order transition to the C-type orbital ordered orthorhombic phase (Pnma) at T_{S}∼77K. In contrast,…
[Phys. Rev. B 95, 184107] Published Fri May 19, 2017



Emergent facilitation behavior in a distinguishable-particle lattice model of glass

2017-05-19T10:00:00-04:00

Author(s): Ling-Han Zhang and Chi-Hang Lam
We propose an interacting lattice gas model of structural glass characterized by particle distinguishability and site-particle-dependent random nearest-neighboring particle interactions. This incorporates disorder quenched in the configuration space rather than in the physical space. The model exhib…
[Phys. Rev. B 95, 184202] Published Fri May 19, 2017



Two-dimensional van der Waals p-n junction of InSe/phosphorene

2017-05-19T10:00:00-04:00

Author(s): J. E. Padilha, R. H. Miwa, Antonio J. R. da Silva, and A. Fazzio
We investigate the energetic stability and the structural and electronic properties of semiconductor/semiconductor and semiconductor/metal 2D van der Waals heterostructures composed by combinations of single layer InSe, bilayer phosphorene (BP), and graphene. For the semiconductor/semiconductor BP/I…
[Phys. Rev. B 95, 195143] Published Fri May 19, 2017



Giant exciton Fano resonance in quasi-one-dimensional Ta_{2} NiSe_{5}

2017-05-19T10:00:00-04:00

Author(s): T. I. Larkin, A. N. Yaresko, D. Pröpper, K. A. Kikoin, Y. F. Lu, T. Takayama, Y.-L. Mathis, A. W. Rost, H. Takagi, B. Keimer, and A. V. Boris
We report the complex dielectric function of the quasi-one-dimensional chalcogenide Ta_{2}NiSe_{5}, which undergoes a structural phase transition presumably associated with exciton condensation below T_{c}=326 K [Y. Wakisaka et al., Phys. Rev. Lett. 103, 026402 (2009); Y. F. Lu et al., Nat. Commun…
[Phys. Rev. B 95, 195144] Published Fri May 19, 2017



Lattice-layer entanglement in Bernal-stacked bilayer graphene

2017-05-19T10:00:00-04:00

Author(s): Victor A. S. V. Bittencourt and Alex E. Bernardini
The complete lattice-layer entanglement structure of Bernal-stacked bilayer graphene is obtained for the quantum system described by a tight-binding Hamiltonian which includes mass and bias voltage terms. Through a suitable correspondence with the parity-spin SU(2)⊗SU(2) structure of a Dirac Hamilto…
[Phys. Rev. B 95, 195145] Published Fri May 19, 2017



Resonance fluorescence and phase-dependent spectra of a singly charged n-doped quantum dot in the Voigt geometry

2017-05-19T10:00:00-04:00

Author(s): F. Carreño, S. Maede-Razavi, and M. A. Antón
We report on the resonance fluorescence and phase-dependent spectra in singly charged n-doped quantum dots in the presence of a strong external magnetic field in the Voigt geometry. The use of a nonresonant laser field driving two of the four active transitions results in the obtention of fluorescen…
[Phys. Rev. B 95, 195310] Published Fri May 19, 2017



Effect of long-range interaction on graphene edge magnetism

2017-05-19T10:00:00-04:00

Author(s): Zheng Shi and Ian Affleck
It has been proposed that interactions lead to ferromagnetism on a zigzag edge of a graphene sheet. While not yet directly studied experimentally, dramatically improving techniques for making and studying clean zigzag edges may soon make this possible. So far, most theoretical investigations of this…
[Phys. Rev. B 95, 195420] Published Fri May 19, 2017



Detecting topological superconductivity with φ_{0} Josephson junctions

2017-05-19T10:00:00-04:00

Author(s): Constantin Schrade, Silas Hoffman, and Daniel Loss
The recent experimental discovery of φ_{0} Josephson junctions by Szombati et al. [Nat. Phys. 12, 568 (2016)], characterized by a finite phase offset in the supercurrent, requires the same ingredients as topological superconductors, which suggests a profound connection between these two distinct phe…
[Phys. Rev. B 95, 195421] Published Fri May 19, 2017



Solvable models for neutral modes in fractional quantum Hall edges

2017-05-19T10:00:00-04:00

Author(s): Chris Heinrich and Michael Levin
We describe solvable models that capture how impurity scattering in certain fractional quantum Hall edges can give rise to a neutral mode—i.e., an edge mode that does not carry electric charge. These models consist of two counterpropagating chiral Luttinger liquids together with a collection of disc…
[Phys. Rev. B 95, 205129] Published Fri May 19, 2017



Enforcing conservation laws in nonequilibrium cluster perturbation theory

2017-05-19T10:00:00-04:00

Author(s): Christian Gramsch and Michael Potthoff
Using the recently introduced time-local formulation of the nonequilibrium cluster perturbation theory (CPT), we construct a generalization of the approach such that macroscopic conservation laws are respected. This is achieved by exploiting the freedom for the choice of the starting point of the al…
[Phys. Rev. B 95, 205130] Published Fri May 19, 2017



Experimental verification of orbital engineering at the atomic scale: Charge transfer and symmetry breaking in nickelate heterostructures

2017-05-19T10:00:00-04:00

Author(s): Patrick J. Phillips, Xue Rui, Alexandru B. Georgescu, Ankit S. Disa, Paolo Longo, Eiji Okunishi, Fred Walker, Charles H. Ahn, Sohrab Ismail-Beigi, and Robert F. Klie
Epitaxial strain, layer confinement, and inversion symmetry breaking have emerged as powerful new approaches to control the electronic and atomic-scale structural properties of complex metal oxides. Trivalent rare-earth (RE) nickelate RENiO_{3} heterostructures have been shown to be exemplars since …
[Phys. Rev. B 95, 205131] Published Fri May 19, 2017



Possible nematic spin liquid in spin-1 antiferromagnetic system on the square lattice: Implications for the nematic paramagnetic state of FeSe

2017-05-19T10:00:00-04:00

Author(s): Shou-Shu Gong, W. Zhu, D. N. Sheng, and Kun Yang
The exotic normal state of iron chalcogenide superconductor FeSe, which exhibits vanishing magnetic order and possesses an electronic nematic order, triggered extensive explorations of its magnetic ground state. To understand its novel properties, we study the ground state of a highly frustrated spi…
[Phys. Rev. B 95, 205132] Published Fri May 19, 2017



Domain formation mechanism of the Si(110) “16×2” reconstruction

2017-05-19T10:00:00-04:00

Author(s): N. K. Lewis, N. B. Clayburn, E. Brunkow, T. J. Gay, Y. Lassailly, J. Fujii, I. Vobornik, W. R. Flavell, and E. A. Seddon
The main factor that determines which of the two domains forms upon reconstruction of the Si(110) “16×2” surface has been investigated. Low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) images showed that the domain orientation was independent of the heating current dire…
[Phys. Rev. B 95, 205306] Published Fri May 19, 2017



Halo-substituted azobenzenes adsorbed at Ag(111) and Au(111) interfaces: Structures and optical properties

2017-05-19T10:00:00-04:00

Author(s): Zak E. Hughes, Alexander Baev, Paras N. Prasad, and Tiffany R. Walsh
The adsorption of azobenzene (AB), ortho fluoro-azobenzene (FAB) and ortho chlor-azobenzol (ClAB), in both the cis and trans isomers, at the Au(111) and Ag(111) surfaces is investigated using plane-wave density functional calculations with the revPBE-vdW-DF functional. The resulting adsorption energ…
[Phys. Rev. B 95, 205425] Published Fri May 19, 2017



Optical and structural study of the pressure-induced phase transition of CdWO_{4}

2017-05-18T10:00:00-04:00

Author(s): J. Ruiz-Fuertes, A. Friedrich, D. Errandonea, A. Segura, W. Morgenroth, P. Rodríguez-Hernández, A. Muñoz, and Y. Meng
The optical absorption of CdWO_{4} is reported at high pressures up to 23 GPa. The onset of a phase transition was detected at 19.5 GPa, in good agreement with a previous Raman spectroscopy study. The crystal structure of the high-pressure phase of CdWO_{4} was solved at 22 GPa, employing single-cry…
[Phys. Rev. B 95, 174105] Published Thu May 18, 2017



Entropy production in a photovoltaic cell

2017-05-18T10:00:00-04:00

Author(s): Mohammad H. Ansari
We evaluate entropy production in a photovoltaic cell that is modeled by four electronic levels resonantly coupled to thermally populated field modes at different temperatures. We use a formalism recently proposed, the so-called multiple parallel worlds, to consistently address the nonlinearity of e…
[Phys. Rev. B 95, 174302] Published Thu May 18, 2017



Contracting non-Joulian magnets

2017-05-18T10:00:00-04:00

Author(s): Tanvir M. Saurav, Marcus L. Forst, James A. Boligitz, and Harsh Deep Chopra
Recently, nonvolume conserving or non-Joulian magnetostriction has been reported in Fe-Ga alloys [H. D. Chopra and M. Wuttig, Nature (London) 521, 340 (2015); H. D. Chopra and M. Wuttig, Nature (London) 538, 416 (2016)] that increase their volume by expanding in magnetic fields. Here, we report a co…
[Phys. Rev. B 95, 174425] Published Thu May 18, 2017



Lack of correlation between the spin-mixing conductance and the inverse spin Hall effect generated voltages in CoFeB/Pt and CoFeB/Ta bilayers

2017-05-18T10:00:00-04:00

Author(s): A. Conca, B. Heinz, M. R. Schweizer, S. Keller, E. Th. Papaioannou, and B. Hillebrands
We investigate spin pumping phenomena in polycrystalline CoFeB/Pt and CoFeB/Ta bilayers and the correlation between the effective spin-mixing conductance g_{eff}^{↑↓} and the obtained voltages generated by the spin-to-charge current conversion via the inverse spin Hall effect in the Pt and Ta layers…
[Phys. Rev. B 95, 174426] Published Thu May 18, 2017



Suppression of the commensurate magnetic phase in nanosized hübnerite MnWO_{4}

2017-05-18T10:00:00-04:00

Author(s): P. Zajdel, A. Gągor, D. M. Pajerowski, M. Ptak, and M. Szlawska
Magnetic structures of nanosized (20 to 70 nm) powders of MnWO_{4} and MnWO_{4}:Mo were studied using neutron powder diffraction (NPD). Sizes and shapes of the crystallites calculated from anisotropic peak broadening of diffraction peaks were found to be orthogonal parallelepipedlike with the longes…
[Phys. Rev. B 95, 174427] Published Thu May 18, 2017



Signature of Hanle precession in trilayer MoS_{2} : Theory and experiment

2017-05-18T10:00:00-04:00

Author(s): K. Tian, Z. Yue, D. Magginetti, M. E. Raikh, and A. Tiwari
Valley-spin coupling in transition-metal dichalcogenides (TMDs) can result in unusual spin transport behaviors under an external magnetic field. Nonlocal resistance measured from two-dimensional materials such as TMDs via electrical Hanle experiments is predicted to exhibit nontrivial features compa…
[Phys. Rev. B 95, 174428] Published Thu May 18, 2017



Relation between Kitaev magnetism and structure in α−RuCl_{3}

2017-05-18T10:00:00-04:00

Author(s): A. Glamazda, P. Lemmens, S.-H. Do, Y. S. Kwon, and K.-Y. Choi
Raman scattering has been employed to investigate lattice and magnetic excitations of the honeycomb Kitaev material α−RuCl_{3} and its Heisenberg counterpart CrCl_{3}. Our phonon Raman spectra give evidence for a first-order structural transition from a monoclinic to a rhombohedral structure for bot…
[Phys. Rev. B 95, 174429] Published Thu May 18, 2017



d-wave superconductivity in boson+fermion dimer models

2017-05-18T10:00:00-04:00

Author(s): Garry Goldstein, Claudio Chamon, and Claudio Castelnovo
We present a slave-particle mean-field study of the mixed boson+fermion quantum dimer model introduced by Punk et al. [Proc. Natl. Acad. Sci. USA 112, 9552 (2015)] to describe the physics of the pseudogap phase in cuprate superconductors. Our analysis naturally leads to four charge e fermion pockets…
[Phys. Rev. B 95, 174511] Published Thu May 18, 2017



Instability of the topological surface state in Bi_{2} Se_{3} upon deposition of gold

2017-05-18T10:00:00-04:00

Author(s): A. Polyakov, C. Tusche, M. Ellguth, E. D. Crozier, K. Mohseni, M. M. Otrokov, X. Zubizarreta, M. G. Vergniory, M. Geilhufe, E. V. Chulkov, A. Ernst, H. L. Meyerheim, and S. S. P. Parkin
Momentum-resolved photoemission spectroscopy indicates the instability of the Dirac surface state upon deposition of gold on the (0001) surface of the topological insulator Bi_{2}Se_{3}. Based on the structure model derived from extended x-ray absorption fine structure experiments showing that gold …
[Phys. Rev. B 95, 180202(R)] Published Thu May 18, 2017



Critical behavior at dynamical phase transition in the generalized Bose-Anderson model

2017-05-18T10:00:00-04:00

Author(s): Dmitry V. Chichinadze and Alexey N. Rubtsov
Critical properties of the dynamical phase transition in the quenched generalized Bose-Anderson impurity model are studied in the mean-field limit of an infinite number of channels. The transition separates the evolution toward ground state and toward the branch of stable excited states. We perform …
[Phys. Rev. B 95, 180302(R)] Published Thu May 18, 2017



Pressure-induced magnetic order in FeSe: A muon spin rotation study

2017-05-18T10:00:00-04:00

Author(s): Rustem Khasanov, Zurab Guguchia, Alex Amato, Elvezio Morenzoni, Xiaoli Dong, Fang Zhou, and Zhongxian Zhao
The magnetic order induced by the pressure was studied in FeSe by means of muon spin rotation (μSR) technique. By following the evolution of the oscillatory part of the μSR signal as a function of angle between the initial muon spin polarization and 101 axis of the studied FeSe sample, it was found …
[Phys. Rev. B 95, 180504(R)] Published Thu May 18, 2017



Manipulating the mechanical properties of Ti_{2} C MXene: Effect of substitutional doping

2017-05-18T10:00:00-04:00

Author(s): Poulami Chakraborty, Tilak Das, Dhani Nafday, Lilia Boeri, and Tanusri Saha-Dasgupta
With the aim of manipulating the mechanical properties of the recently discussed two-dimensional material MXene, we investigate the effect of alloying. We consider substitutional doping of B and V at Ti and C sites of Ti_{2}C. Calculations of quantities such as in-plane stiffness, Young's modulus, a…
[Phys. Rev. B 95, 184106] Published Thu May 18, 2017



Hydrodynamic phonon drift and second sound in a (20,20) single-wall carbon nanotube

2017-05-18T10:00:00-04:00

Author(s): Sangyeop Lee and Lucas Lindsay
Two hydrodynamic features of phonon transport, phonon drift and second sound, in a (20,20) single-wall carbon nanotube (SWCNT) are discussed using lattice dynamics calculations employing an optimized Tersoff potential for atomic interactions. We formally derive a formula for the contribution of drif…
[Phys. Rev. B 95, 184304] Published Thu May 18, 2017



Magnetic and magnetocaloric properties of HoCrO_{3} tuned by selective rare-earth doping

2017-05-18T10:00:00-04:00

Author(s): Shiqi Yin, Mohindar S. Seehra, Curtis J. Guild, Steven L. Suib, Narayan Poudel, Bernd Lorenz, and Menka Jain
Rare-earth chromites (RCrO_{3}) are an important subclass of functional materials with interesting magnetic, electrical, and catalytic properties that make them promising for various applications. Here, we report comparisons on the structural and magnetic properties of HoCrO_{3} with those of Ho_{0.…
[Phys. Rev. B 95, 184421] Published Thu May 18, 2017



Structural dynamics during laser-induced ultrafast demagnetization

2017-05-18T10:00:00-04:00

Author(s): Emmanuelle Jal, Víctor López-Flores, Niko Pontius, Tom Ferté, Nicolas Bergeard, Christine Boeglin, Boris Vodungbo, Jan Lüning, and Nicolas Jaouen

Despite two decades of intense research, the origin of ultrafast demagnetization remains disputed. Here, the authors employ resonant magnetic x-ray reflectivity to follow simultaneously magnetization and structural dynamics at the BESSY femtoslicing source. They find that significant changes in nonmagnetic x-ray reflectivity accompany the subpicosecond demagnetization, which can be modeled as a variation of film thickness. Their simulations further show that the higher photon flux and energy resolution provided by x-ray free electron lasers will yield decisive data to differentiate between different mechanisms proposed to govern ultrafast demagnetization dynamics.

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[Phys. Rev. B 95, 184422] Published Thu May 18, 2017



Engineering one-dimensional topological phases on p-wave superconductors

2017-05-18T10:00:00-04:00

Author(s): Isac Sahlberg, Alex Westström, Kim Pöyhönen, and Teemu Ojanen
In this paper, we study how, with the aid of impurity engineering, two-dimensional p-wave superconductors can be employed as a platform for one-dimensional topological phases. We discover that, while chiral and helical parent states themselves are topologically nontrivial, a chain of scalar impuriti…
[Phys. Rev. B 95, 184512] Published Thu May 18, 2017



Magnetic Chern bands and triplon Hall effect in an extended Shastry-Sutherland model

2017-05-18T10:00:00-04:00

Author(s): M. Malki and K. P. Schmidt
We study topological properties of one-triplon bands in an extended Shastry-Sutherland model relevant for the frustrated quantum magnet SrCu_{2}(BO_{3})_{2}. To this end perturbative continuous unitary transformations are applied about the isolated dimer limit allowing us to calculate the one-triplo…
[Phys. Rev. B 95, 195137] Published Thu May 18, 2017



Three-dimensionality of the bulk electronic structure in WTe_{2}

2017-05-18T10:00:00-04:00

Author(s): Yun Wu, Na Hyun Jo, Daixiang Mou, Lunan Huang, S. L. Bud'ko, P. C. Canfield, and Adam Kaminski
We use temperature- and field-dependent resistivity measurements (Shubnikov–de Haas quantum oscillations) and ultrahigh-resolution, tunable, vacuum ultraviolet laser-based angle-resolved photoemission spectroscopy (ARPES) to study the three-dimensionality (3D) of the bulk electronic structure in WTe…
[Phys. Rev. B 95, 195138] Published Thu May 18, 2017