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Preview: Recent Articles in Phys. Rev. Lett.

Recent Articles in Phys. Rev. Lett.

Recent articles in Physical Review Letters

Published: 2017-06-23T16:29:23-04:00


Multispecies Trapped-Ion Node for Quantum Networking


Author(s): I. V. Inlek, C. Crocker, M. Lichtman, K. Sosnova, and C. Monroe

For the first time, ion-photon entanglement and two-quibit gating, two operations necessary for realizing fully functioning quantum computing nodes, are realized in the same experiment.

[Phys. Rev. Lett. 118, 250502] Published Fri Jun 23, 2017

Selection Rule for Enhanced Dark Matter Annihilation


Author(s): Anirban Das and Basudeb Dasgupta
We point out a selection rule for enhancement (suppression) of odd (even) partial waves of dark matter coannihilation or annihilation using the Sommerfeld effect. Using this, the usually velocity-suppressed p-wave annihilation can dominate the annihilation signals in the present Universe. The select...
[Phys. Rev. Lett. 118, 251101] Published Fri Jun 23, 2017

Dark Matter Search Results from the PICO−60 C_{3}F_{8} Bubble Chamber


Author(s): C. Amole et al. (PICO Collaboration)

The best limits, to date, on WIMP spin-dependent interactions with protons and neutrons are obtained by the PICO and LUX collaborations, respectively.

[Phys. Rev. Lett. 118, 251301] Published Fri Jun 23, 2017

Limits on Spin-Dependent WIMP-Nucleon Cross Section Obtained from the Complete LUX Exposure


Author(s): D. S. Akerib et al. (LUX Collaboration)

The best limits, to date, on WIMP spin-dependent interactions with protons and neutrons are obtained by the PICO and LUX collaborations, respectively.

[Phys. Rev. Lett. 118, 251302] Published Fri Jun 23, 2017

Electric Dipole Polarizability of ^{48}Ca and Implications for the Neutron Skin


Author(s): J. Birkhan, M. Miorelli, S. Bacca, S. Bassauer, C. A. Bertulani, G. Hagen, H. Matsubara, P. von Neumann-Cosel, T. Papenbrock, N. Pietralla, V. Yu. Ponomarev, A. Richter, A. Schwenk, and A. Tamii
The electric dipole strength distribution in ^{48}Ca between 5 and 25 MeV has been determined at RCNP, Osaka from proton inelastic scattering experiments at forward angles. Combined with photoabsorption data at higher excitation energy, this enables the first extraction of the electric dipole polari...
[Phys. Rev. Lett. 118, 252501] Published Fri Jun 23, 2017

Reducing Phonon-Induced Decoherence in Solid-State Single-Photon Sources with Cavity Quantum Electrodynamics


Author(s): T. Grange, N. Somaschi, C. Antón, L. De Santis, G. Coppola, V. Giesz, A. Lemaître, I. Sagnes, A. Auffèves, and P. Senellart
Solid-state emitters are excellent candidates for developing integrated sources of single photons. Yet, phonons degrade the photon indistinguishability both through pure dephasing of the zero-phonon line and through phonon-assisted emission. Here, we study theoretically and experimentally the indist...
[Phys. Rev. Lett. 118, 253602] Published Fri Jun 23, 2017

Coherent Transfer between Low-Angular-Momentum and Circular Rydberg States


Author(s): A. Signoles, E. K. Dietsche, A. Facon, D. Grosso, S. Haroche, J. M. Raimond, M. Brune, and S. Gleyzes
We realize a coherent transfer between a laser-accessible low-angular-momentum Rydberg state and the circular Rydberg level with maximal angular momentum. It is induced by a radio frequency field with a high-purity σ^{+} polarization resonant on Stark transitions inside the hydrogenic Rydberg manifo...
[Phys. Rev. Lett. 118, 253603] Published Fri Jun 23, 2017

Studying the Dynamics of Relativistic Laser-Plasma Interaction on Thin Foils by Means of Fourier-Transform Spectral Interferometry


Author(s): V. Bagnoud, J. Hornung, T. Schlegel, B. Zielbauer, C. Brabetz, M. Roth, P. Hilz, M. Haug, J. Schreiber, and F. Wagner
We apply Fourier-transform spectral interferometry (FTSI) to study the interaction of intense laser pulses with ultrathin targets. Ultrathin submicrometer-thick solid CH targets were shot at the PHELIX laser facility with an intensity in the mid to upper 10^{19}  W/cm^{2} range using an innovative d...
[Phys. Rev. Lett. 118, 255003] Published Fri Jun 23, 2017

Mode Specific Electronic Friction in Dissociative Chemisorption on Metal Surfaces: H_{2} on Ag(111)


Author(s): Reinhard J. Maurer, Bin Jiang, Hua Guo, and John C. Tully
Electronic friction and the ensuing nonadiabatic energy loss play an important role in chemical reaction dynamics at metal surfaces. Using molecular dynamics with electronic friction evaluated on the fly from density functional theory, we find strong mode dependence and a dominance of nonadiabatic e...
[Phys. Rev. Lett. 118, 256001] Published Fri Jun 23, 2017

Extremely Large Magnetoresistance in a Topological Semimetal Candidate Pyrite PtBi_{2}


Author(s): Wenshuai Gao, Ningning Hao, Fa-Wei Zheng, Wei Ning, Min Wu, Xiangde Zhu, Guolin Zheng, Jinglei Zhang, Jianwei Lu, Hongwei Zhang, Chuanying Xi, Jiyong Yang, Haifeng Du, Ping Zhang, Yuheng Zhang, and Mingliang Tian

A magnetoresistance of 11.2 million percent is observed in PtBi2 single crystals at a temperature of 1.8 K, a value projected to be higher than previously reported for Dirac materials at 60 T.

[Phys. Rev. Lett. 118, 256601] Published Fri Jun 23, 2017

Optimal Quantum Interference Thermoelectric Heat Engine with Edge States


Author(s): Peter Samuelsson, Sara Kheradsoud, and Björn Sothmann
We show theoretically that a thermoelectric heat engine, operating exclusively due to quantum-mechanical interference, can reach optimal linear-response performance. A chiral edge state implementation of a close-to-optimal heat engine is proposed in an electronic Mach-Zehnder interferometer with a m...
[Phys. Rev. Lett. 118, 256801] Published Fri Jun 23, 2017

Controlling the Topological Sector of Magnetic Solitons in Exfoliated Cr_{1/3}NbS_{2} Crystals


Author(s): L. Wang, N. Chepiga, D.-K. Ki, L. Li, F. Li, W. Zhu, Y. Kato, O. S. Ovchinnikova, F. Mila, I. Martin, D. Mandrus, and A. F. Morpurgo

Film thickness dependent changes in the topological properties of magnetic solitons are tracked via magnetotransport measurements in exfoliated crystals of the monoaxial chiral helimagnet Cr1/3NbS2.

[Phys. Rev. Lett. 118, 257203] Published Fri Jun 23, 2017

Landau-Zener Transition in a Continuously Measured Single-Molecule Spin Transistor


Author(s): F. Troiani, C. Godfrin, S. Thiele, F. Balestro, W. Wernsdorfer, S. Klyatskaya, M. Ruben, and M. Affronte
We monitor the Landau-Zener dynamics of a single-ion magnet inserted into a spin-transistor geometry. For increasing field-sweep rates, the spin reversal probability shows increasing deviations from that of a closed system. In the low-conductance limit, such deviations are shown to result from a dep...
[Phys. Rev. Lett. 118, 257701] Published Fri Jun 23, 2017

Local Dynamics in Trained Recurrent Neural Networks


Author(s): Alexander Rivkind and Omri Barak
Learning a task induces connectivity changes in neural circuits, thereby changing their dynamics. To elucidate task-related neural dynamics, we study trained recurrent neural networks. We develop a mean field theory for reservoir computing networks trained to have multiple fixed point attractors. Ou...
[Phys. Rev. Lett. 118, 258101] Published Fri Jun 23, 2017

Comment on “Two-Channel Kondo Physics due to As Vacancies in the Layered Compound ZrAs_{1.58}Se_{0.39}”


Author(s): Daniel Gnida
[Phys. Rev. Lett. 118, 259701] Published Fri Jun 23, 2017

Cichorek et al. Reply:


Author(s): T. Cichorek, L. Bochenek, M. Schmidt, R. Niewa, A. Czulucki, G. Auffermann, F. Steglich, R. Kniep, and S. Kirchner
[Phys. Rev. Lett. 118, 259702] Published Fri Jun 23, 2017

Erratum: Quantum State Discrimination Using the Minimum Average Number of Copies [Phys. Rev. Lett. 118, 030502 (2017)]


Author(s): Sergei Slussarenko, Morgan M. Weston, Jun-Gang Li, Nicholas Campbell, Howard M. Wiseman, and Geoff J. Pryde
[Phys. Rev. Lett. 118, 259901] Published Fri Jun 23, 2017

Erratum: Entanglement by Path Identity [Phys. Rev. Lett. 118, 080401 (2017)]


Author(s): Mario Krenn, Armin Hochrainer, Mayukh Lahiri, and Anton Zeilinger
[Phys. Rev. Lett. 118, 259902] Published Fri Jun 23, 2017

Erratum: High-Fidelity Bidirectional Nuclear Qubit Initialization in SiC [Phys. Rev. Lett. 117, 220503 (2016)]


Author(s): Viktor Ivády, Paul V. Klimov, Kevin C. Miao, Abram L. Falk, David J. Christle, Krisztián Szász, Igor A. Abrikosov, David D. Awschalom, and Adam Gali
[Phys. Rev. Lett. 118, 259903] Published Fri Jun 23, 2017

Device-Independent Tests of Quantum Measurements


Author(s): Michele Dall’Arno, Sarah Brandsen, Francesco Buscemi, and Vlatko Vedral
We consider the problem of characterizing the set of input-output correlations that can be generated by an arbitrarily given quantum measurement. Our main result is to provide a closed-form, full characterization of such a set for any qubit measurement, and to discuss its geometrical interpretation....
[Phys. Rev. Lett. 118, 250501] Published Thu Jun 22, 2017

Top-Bottom Interference Effects in Higgs Plus Jet Production at the LHC


Author(s): Jonas M. Lindert, Kirill Melnikov, Lorenzo Tancredi, and Christopher Wever
We compute next-to-leading order QCD corrections to the top-bottom interference contribution to H+j production at the LHC. To achieve this, we combine the recent computation of the two-loop amplitudes for gg→Hg and qg→Hq, performed in the approximation of a small b-quark mass, and the numerical calc...
[Phys. Rev. Lett. 118, 252002] Published Thu Jun 22, 2017

Single-Photon Interference due to Motion in an Atomic Collective Excitation


Author(s): D. J. Whiting, N. Šibalić, J. Keaveney, C. S. Adams, and I. G. Hughes
We experimentally demonstrate the heralded generation of bichromatic single photons from an atomic collective spin excitation (CSE). The photon arrival times display collective quantum beats, a novel interference effect resulting from the relative motion of atoms in the CSE. A combination of velocit...
[Phys. Rev. Lett. 118, 253601] Published Thu Jun 22, 2017

Soliton Pulse Propagation in the Presence of Disorder-Induced Multiple Scattering in Photonic Crystal Waveguides


Author(s): Nishan Mann and Stephen Hughes
We introduce a new coupled mode theory to model nonlinear Schrödinger equations for counterpropagating Bloch modes that include disorder-induced multiple scattering effects on nonlinear soliton propagation in photonic crystal waveguides. We also derive subunit-cell coupling coefficients and use thes...
[Phys. Rev. Lett. 118, 253901] Published Thu Jun 22, 2017

Achieving Arbitrary Control over Pairs of Polarization States Using Complex Birefringent Metamaterials


Author(s): Alexander Cerjan and Shanhui Fan
We demonstrate that the key to realizing arbitrary control over pairs of polarization states of light, i.e., transforming an arbitrarily polarized pair of input states to an arbitrarily polarized pair of output states, is the ability to generate pairs of states with orthogonal polarizations from non...
[Phys. Rev. Lett. 118, 253902] Published Thu Jun 22, 2017

Spatiotemporal Evolution of Runaway Electron Momentum Distributions in Tokamaks


Author(s): C. Paz-Soldan, C. M. Cooper, P. Aleynikov, D. C. Pace, N. W. Eidietis, D. P. Brennan, R. S. Granetz, E. M. Hollmann, C. Liu, A. Lvovskiy, R. A. Moyer, and D. Shiraki
Novel spatial, temporal, and energetically resolved measurements of bremsstrahlung hard-x-ray (HXR) emission from runaway electron (RE) populations in tokamaks reveal nonmonotonic RE distribution functions whose properties depend on the interplay of electric field acceleration with collisional and s...
[Phys. Rev. Lett. 118, 255002] Published Thu Jun 22, 2017

Time Resolved Measurements of the Switching Trajectory of Pt/Co Elements Induced by Spin-Orbit Torques


Author(s): M. M. Decker, M. S. Wörnle, A. Meisinger, M. Vogel, H. S. Körner, G. Y. Shi, C. Song, M. Kronseder, and C. H. Back
We report the experimental observation of spin-orbit torque induced switching of perpendicularly magnetized Pt/Co elements in a time resolved stroboscopic experiment based on high resolution Kerr microscopy. Magnetization dynamics is induced by injecting subnanosecond current pulses into the bilayer...
[Phys. Rev. Lett. 118, 257201] Published Thu Jun 22, 2017

Coherent THz Transient Spin Currents by Spin Pumping


Author(s): Lars Bocklage
The generation of short spin current pulses is the basis for fast spintronic devices. In thin bilayer systems consisting of a nonmagnetic metal and a ferromagnet, a pure spin current is induced by a precessing magnetization into the nonmagnetic layer by spin pumping. This effect has been experimenta...
[Phys. Rev. Lett. 118, 257202] Published Thu Jun 22, 2017

Coherent Plasmon and Phonon-Plasmon Resonances in Carbon Nanotubes


Author(s): Abram L. Falk, Kuan-Chang Chiu, Damon B. Farmer, Qing Cao, Jerry Tersoff, Yi-Hsien Lee, Phaedon Avouris, and Shu-Jen Han
Carbon nanotubes provide a rare access point into the plasmon physics of one-dimensional electronic systems. By assembling purified nanotubes into uniformly sized arrays, we show that they support coherent plasmon resonances, that these plasmons couple to nanotube and substrate phonons, and that the...
[Phys. Rev. Lett. 118, 257401] Published Thu Jun 22, 2017

Quantum-Dot Single-Photon Sources for Entanglement Enhanced Interferometry


Author(s): M. Müller, H. Vural, C. Schneider, A. Rastelli, O. G. Schmidt, S. Höfling, and P. Michler
Multiphoton entangled states such as “N00N states” have attracted a lot of attention because of their possible application in high-precision, quantum enhanced phase determination. So far, N00N states have been generated in spontaneous parametric down-conversion processes and by mixing quantum and cl...
[Phys. Rev. Lett. 118, 257402] Published Thu Jun 22, 2017

Charge Density Waves and the Hidden Nesting of Purple Bronze K_{0.9}Mo_{6}O_{17}


Author(s): Lei Su, Chuang-Han Hsu, Hsin Lin, and Vitor M. Pereira
We introduce the first multiorbital effective tight-binding model to describe the effect of electron-electron interactions in this system. Upon fixing all the effective hopping parameters in the normal state against an ab initio band structure, and with only the overall scale of the interactions as ...
[Phys. Rev. Lett. 118, 257601] Published Thu Jun 22, 2017

Search for the Decays B_{s}^{0}→τ^{+}τ^{−} and B^{0}→τ^{+}τ^{−}


Author(s): R. Aaij et al. (LHCb Collaboration)
A search for the rare decays B_{s}^{0}→τ^{+}τ^{−} and B^{0}→τ^{+}τ^{−} is performed using proton–proton collision data collected with the LHCb detector. The data sample corresponds to an integrated luminosity of 3  fb^{−1} collected in 2011 and 2012. The τ leptons are reconstructed through the decay...
[Phys. Rev. Lett. 118, 251802] Published Wed Jun 21, 2017

Exploratory Lattice QCD Study of the Rare Kaon Decay K^{+}→π^{+}νν[over ¯]


Author(s): Ziyuan Bai, Norman H. Christ, Xu Feng, Andrew Lawson, Antonin Portelli, and Christopher T. Sachrajda (RBC-UKQCD Collaboration)
We report a first, complete lattice QCD calculation of the long-distance contribution to the K^{+}→π^{+}νν[over ¯] decay within the standard model. This is a second-order weak process involving two four-Fermi operators that is highly sensitive to new physics and being studied by the NA62 experiment ...
[Phys. Rev. Lett. 118, 252001] Published Wed Jun 21, 2017

Composite Dislocations in Smectic Liquid Crystals


Author(s): Hillel Aharoni, Thomas Machon, and Randall D. Kamien
Smectic liquid crystals are characterized by layers that have a preferred uniform spacing and vanishing curvature in their ground state. Dislocations in smectics play an important role in phase nucleation, layer reorientation, and dynamics. Typically modeled as possessing one line singularity, the l...
[Phys. Rev. Lett. 118, 257801] Published Wed Jun 21, 2017

Exact Results for Quenched Bond Randomness at Criticality


Author(s): Gesualdo Delfino
We introduce an exact replica method for the study of critical systems with quenched bond randomness in two dimensions. For the q-state Potts model, we show that a line of renormalization group fixed points interpolates from weak to strong randomness as q−2 grows from small to large values. This the...
[Phys. Rev. Lett. 118, 250601] Published Tue Jun 20, 2017

Renormalization Group Flows of Hamiltonians Using Tensor Networks


Author(s): M. Bal, M. Mariën, J. Haegeman, and F. Verstraete
A renormalization group flow of Hamiltonians for two-dimensional classical partition functions is constructed using tensor networks. Similar to tensor network renormalization [G. Evenbly and G. Vidal, Phys. Rev. Lett. 115, 180405 (2015); S. Yang, Z.-C. Gu, and X.-G. Wen, Phys. Rev. Lett. 118, 110504...
[Phys. Rev. Lett. 118, 250602] Published Tue Jun 20, 2017

Recoil Inversion in the Photodissociation of Carbonyl Sulfide near 234 nm


Author(s): Dimitris Sofikitis, Jaime Suarez, Johan A. Schmidt, T. Peter Rakitzis, Stavros C. Farantos, and Maurice H. M. Janssen
We report the observation of recoil inversion of the CO (v=0, J_{CO}=66) state in the UV dissociation of lab-frame oriented carbonyl sulfide (OCS). This state is ejected in the opposite direction with respect to all other (>30) states and in absence of any OCS rotation, thus resulting in spatial filt...
[Phys. Rev. Lett. 118, 253001] Published Tue Jun 20, 2017

Dispersive Dam-Break Flow of a Photon Fluid


Author(s): Gang Xu, Matteo Conforti, Alexandre Kudlinski, Arnaud Mussot, and Stefano Trillo

High-intensity photon beams exhibit behavior reminiscent of water flowing after a dam collapses.

[Phys. Rev. Lett. 118, 254101] Published Tue Jun 20, 2017

Parametric Oscillation, Frequency Mixing, and Injection Locking of Strongly Coupled Nanomechanical Resonator Modes


Author(s): Maximilian J. Seitner, Mehdi Abdi, Alessandro Ridolfo, Michael J. Hartmann, and Eva M. Weig
We study locking phenomena of two strongly coupled, high quality factor nanomechanical resonator modes to a common parametric drive at a single drive frequency in different parametric driving regimes. By controlled dielectric gradient forces we tune the resonance frequencies of the flexural in-plane...
[Phys. Rev. Lett. 118, 254301] Published Tue Jun 20, 2017

Unveiling Extreme Anisotropy in Elastic Structured Media


Author(s): G. Lefebvre, T. Antonakakis, Y. Achaoui, R. V. Craster, S. Guenneau, and P. Sebbah
Periodic structures can be engineered to exhibit unique properties observed at symmetry points, such as zero group velocity, Dirac cones, and saddle points; identifying these and the nature of the associated modes from a direct reading of the dispersion surfaces is not straightforward, especially in...
[Phys. Rev. Lett. 118, 254302] Published Tue Jun 20, 2017

Effect of Partially Screened Nuclei on Fast-Electron Dynamics


Author(s): L. Hesslow, O. Embréus, A. Stahl, T. C. DuBois, G. Papp, S. L. Newton, and T. Fülöp
We analyze the dynamics of fast electrons in plasmas containing partially ionized impurity atoms, where the screening effect of bound electrons must be included. We derive analytical expressions for the deflection and slowing-down frequencies, and show that they are increased significantly compared ...
[Phys. Rev. Lett. 118, 255001] Published Tue Jun 20, 2017

Grain Boundary Structures and Collective Dynamics of Inversion Domains in Binary Two-Dimensional Materials


Author(s): Doaa Taha, S. K. Mkhonta, K. R. Elder, and Zhi-Feng Huang
Understanding and controlling the properties and dynamics of topological defects is a lasting challenge in the study of two-dimensional materials, and is crucial to achieve high-quality films required for technological applications. Here grain boundary structures, energies, and dynamics of binary tw...
[Phys. Rev. Lett. 118, 255501] Published Tue Jun 20, 2017

Detecting Molecular Rotational Dynamics Complementing the Low-Frequency Terahertz Vibrations in a Zirconium-Based Metal-Organic Framework


Author(s): Matthew R. Ryder, Ben Van de Voorde, Bartolomeo Civalleri, Thomas D. Bennett, Sanghamitra Mukhopadhyay, Gianfelice Cinque, Felix Fernandez-Alonso, Dirk De Vos, Svemir Rudić, and Jin-Chong Tan
We show clear experimental evidence of cooperative terahertz (THz) dynamics observed below 3 THz (∼100  cm^{−1}), for a low-symmetry Zr-based metal-organic framework structure, termed MIL–140A [ZrO(O_{2}C−C_{6}H_{4}−CO_{2})]. Utilizing a combination of high-resolution inelastic neutron scattering an...
[Phys. Rev. Lett. 118, 255502] Published Tue Jun 20, 2017

Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay


Author(s): F. P. An et al. (Daya Bay Collaboration)

The Daya Bay Collaboration reports that sterile neutrinos probably aren’t behind a puzzling deficit in detected antineutrinos at nuclear reactors.

[Phys. Rev. Lett. 118, 251801] Published Mon Jun 19, 2017

Beam-Target Helicity Asymmetry for γ[over →]n[over →]→π^{−}p in the N^{*} Resonance Region


Author(s): D. Ho et al. (CLAS Collaboration)
We report the first beam-target double-polarization asymmetries in the γ+n(p)→π^{−}+p(p) reaction spanning the nucleon resonance region from invariant mass W=1500 to 2300 MeV. Circularly polarized photons and longitudinally polarized deuterons in solid hydrogen deuteride (HD) have been used with the...
[Phys. Rev. Lett. 118, 242002] Published Fri Jun 16, 2017

Shell Evolution towards ^{78}Ni: Low-Lying States in ^{77}Cu


Author(s): E. Sahin et al.
The level structure of the neutron-rich ^{77}Cu nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of ^{77}Ni are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implant...
[Phys. Rev. Lett. 118, 242502] Published Fri Jun 16, 2017

Time-Local Equation for the Exact Optimized Effective Potential in Time-Dependent Density Functional Theory


Author(s): Sheng-Lun Liao, Tak-San Ho, Herschel Rabitz, and Shih-I Chu
A long-standing challenge in the time-dependent density functional theory is to efficiently solve the exact time-dependent optimized effective potential (TDOEP) integral equation derived from orbital-dependent functionals, especially for the study of nonadiabatic dynamics in time-dependent external ...
[Phys. Rev. Lett. 118, 243001] Published Fri Jun 16, 2017

Ultrafast Magnetization of a Dense Molecular Gas with an Optical Centrifuge


Author(s): A. A. Milner, A. Korobenko, and V. Milner

The electronic spin of paramagnetic molecules is controlled by manipulating their rotation, polarizing them. This technique should be applicable to many other paramagnetic molecules.

[Phys. Rev. Lett. 118, 243201] Published Fri Jun 16, 2017

Light Meets Water in Nonlocal Media: Surface Tension Analogue in Optics


Author(s): Theodoros P. Horikis and Dimitrios J. Frantzeskakis
Shallow water wave phenomena find their analogue in optics through a nonlocal nonlinear Schrödinger (NLS) model in 2+1 dimensions. We identify an analogue of surface tension in optics, namely, a single parameter depending on the degree of nonlocality, which changes the sign of dispersion, much like ...
[Phys. Rev. Lett. 118, 243903] Published Fri Jun 16, 2017

Nonlinear Surface Lattice Resonance in Plasmonic Nanoparticle Arrays


Author(s): Lior Michaeli, Shay Keren-Zur, Ori Avayu, Haim Suchowski, and Tal Ellenbogen

A 30-fold increase in second harmonic emission is reported from an array of split-ring resonators. The enhancement is attributed to two sources: the Rayleigh-Wood anomaly and a collective surface lattice resonance mode.

[Phys. Rev. Lett. 118, 243904] Published Fri Jun 16, 2017

Adiabatic Invariant Approach to Transverse Instability: Landau Dynamics of Soliton Filaments


Author(s): P. G. Kevrekidis, Wenlong Wang, R. Carretero-González, and D. J. Frantzeskakis
Consider a lower-dimensional solitonic structure embedded in a higher-dimensional space, e.g., a 1D dark soliton embedded in 2D space, a ring dark soliton in 2D space, a spherical shell soliton in 3D space, etc. By extending the Landau dynamics approach [Phys. Rev. Lett. 93, 240403 (2004)], we show ...
[Phys. Rev. Lett. 118, 244101] Published Fri Jun 16, 2017

Adsorption-Mediated Mass Streaming in a Standing Acoustic Wave


Author(s): Oren Weltsch, Avshalom Offner, Dan Liberzon, and Guy Z. Ramon
Oscillating flows can generate nonzero, time-averaged fluxes despite the velocity averaging zero over an oscillation cycle. Here, we report such a flux, a nonlinear resultant of the interaction between oscillating velocity and concentration fields. Specifically, we study a gas mixture sustaining a s...
[Phys. Rev. Lett. 118, 244301] Published Fri Jun 16, 2017

Role of Magnetic Reconnection in Magnetohydrodynamic Turbulence


Author(s): Nuno F. Loureiro and Stanislav Boldyrev
The current understanding of magnetohydrodynamic (MHD) turbulence envisions turbulent eddies which are anisotropic in all three directions. In the plane perpendicular to the local mean magnetic field, this implies that such eddies become current-sheetlike structures at small scales. We analyze the r...
[Phys. Rev. Lett. 118, 245101] Published Fri Jun 16, 2017

Infrared Topological Plasmons in Graphene


Author(s): Dafei Jin, Thomas Christensen, Marin Soljačić, Nicholas X. Fang, Ling Lu, and Xiang Zhang

Periodically patterned graphene is predicted to host a new class of high-frequency, unidirectional, topological, edge magnetoplasmons.

[Phys. Rev. Lett. 118, 245301] Published Fri Jun 16, 2017

Time Strengthening of Crystal Nanocontacts


Author(s): Juan J. Mazo, Dirk Dietzel, Andre Schirmeisen, J. G. Vilhena, and Enrico Gnecco
We demonstrate how an exponentially saturating increase of the contact area between a nanoasperity and a crystal surface, occurring on time scales governed by the Arrhenius equation, is consistent with measurements of the static friction and lateral contact stiffness on a model alkali-halide surface...
[Phys. Rev. Lett. 118, 246101] Published Fri Jun 16, 2017

Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling


Author(s): S. Dzsaber, L. Prochaska, A. Sidorenko, G. Eguchi, R. Svagera, M. Waas, A. Prokofiev, Q. Si, and S. Paschen
Recent theoretical studies of topologically nontrivial electronic states in Kondo insulators have pointed to the importance of spin-orbit coupling (SOC) for stabilizing these states. However, systematic experimental studies that tune the SOC parameter λ_{SOC} in Kondo insulators remain elusive. The ...
[Phys. Rev. Lett. 118, 246601] Published Fri Jun 16, 2017

Scaling of the Quantum Anomalous Hall Effect as an Indicator of Axion Electrodynamics


Author(s): S. Grauer, K. M. Fijalkowski, S. Schreyeck, M. Winnerlein, K. Brunner, R. Thomale, C. Gould, and L. W. Molenkamp

Evidence of axionic insulating behavior is shown in thin topological insulator films via analysis of conductivity flow diagrams. As film thickness increases, the flow changes from a two-dimensional integer quantum Hall regime to one consistent with an axion insulator.

[Phys. Rev. Lett. 118, 246801] Published Fri Jun 16, 2017

Probing Phase Coupling Between Two Spin-Torque Nano-Oscillators with an External Source


Author(s): Yi Li, Xavier de Milly, Flavio Abreu Araujo, Olivier Klein, Vincent Cros, Julie Grollier, and Grégoire de Loubens
Phase coupling between auto-oscillators is central for achieving coherent responses such as synchronization. Here we present an experimental approach to probe it in the case of two dipolarly coupled spin-torque vortex nano-oscillators using an external microwave field. By phase locking one oscillato...
[Phys. Rev. Lett. 118, 247202] Published Fri Jun 16, 2017

Skyrmion Knots in Frustrated Magnets


Author(s): Paul Sutcliffe
A magnetic Skyrmion is a stable two-dimensional nanoparticle describing a localized winding of the magnetization in certain magnetic materials. Skyrmions are the subject of intense experimental and theoretical investigation and have potential technological spintronic applications. Here we show that ...
[Phys. Rev. Lett. 118, 247203] Published Fri Jun 16, 2017

Ultrafast Formation of a Charge Density Wave State in 1T−TaS_{2}: Observation at Nanometer Scales Using Time-Resolved X-Ray Diffraction


Author(s): C. Laulhé, T. Huber, G. Lantz, A. Ferrer, S. O. Mariager, S. Grübel, J. Rittmann, J. A. Johnson, V. Esposito, A. Lübcke, L. Huber, M. Kubli, M. Savoini, V. L. R. Jacques, L. Cario, B. Corraze, E. Janod, G. Ingold, P. Beaud, S. L. Johnson, and S. Ravy
Femtosecond time-resolved x-ray diffraction is used to study a photoinduced phase transition between two charge density wave (CDW) states in 1T−TaS_{2}, namely the nearly commensurate (NC) and the incommensurate (I) CDW states. Structural modulations associated with the NC-CDW order are found to dis...
[Phys. Rev. Lett. 118, 247401] Published Fri Jun 16, 2017

Probing a Dissipative Phase Transition via Dynamical Optical Hysteresis


Author(s): S. R. K. Rodriguez, W. Casteels, F. Storme, N. Carlon Zambon, I. Sagnes, L. Le Gratiet, E. Galopin, A. Lemaître, A. Amo, C. Ciuti, and J. Bloch
We experimentally explore the dynamical optical hysteresis of a semiconductor microcavity as a function of the sweep time. The hysteresis area exhibits a double power law decay due to the influence of fluctuations, which trigger switching between metastable states. Upon increasing the average photon...
[Phys. Rev. Lett. 118, 247402] Published Fri Jun 16, 2017

Microscopic Perspective on Photovoltaic Reciprocity in Ultrathin Solar Cells


Author(s): Urs Aeberhard and Uwe Rau
The photovoltaic reciprocity theory relates the electroluminescence spectrum of a solar cell under applied bias to the external photovoltaic quantum efficiency of the device as measured at short circuit conditions. Its derivation is based on detailed balance relations between local absorption and em...
[Phys. Rev. Lett. 118, 247702] Published Fri Jun 16, 2017

Conformational Properties of a Back-Folding Wormlike Chain Confined in a Cylindrical Tube


Author(s): Jeff Z. Y. Chen
When a semiflexible chain is confined in a narrow cylindrical tube, the formation of a polymer hairpin is a geometrical conformation that accompanies an exponentially large local free energy and, hence, is a relatively rare event. Numerical solutions of the hairpin distribution functions for persist...
[Phys. Rev. Lett. 118, 247802] Published Fri Jun 16, 2017

Logarithmic Exchange Kinetics in Monodisperse Copolymeric Micelles


Author(s): Fabián A. García Daza, Josep Bonet Avalos, and Allan D. Mackie
Experimental measurements of the relaxation kinetics of copolymeric surfactant exchange for micellar systems unexpectedly show a peculiar logarithmic decay. Several authors use polydispersity as an explanation for this behavior. However, in coarse-grained simulations that preserve microscopic detail...
[Phys. Rev. Lett. 118, 248001] Published Fri Jun 16, 2017

Dimensional, Geometrical, and Physical Constraints in Skull Growth


Author(s): Johannes Weickenmeier, Cedric Fischer, Dennis Carter, Ellen Kuhl, and Alain Goriely

A model predicts skull growth patterns based on mechanical effects, rather than biology, and could help surgeons treating patients with head growth problems.

[Phys. Rev. Lett. 118, 248101] Published Fri Jun 16, 2017

Observation of Topological Bloch-State Defects and Their Merging Transition


Author(s): Matthias Tarnowski, Marlon Nuske, Nick Fläschner, Benno Rem, Dominik Vogel, Lukas Freystatzky, Klaus Sengstock, Ludwig Mathey, and Christof Weitenberg

A new method is proposed and demonstrated for detecting topological phenomena in cold atoms confined in optical lattices.

[Phys. Rev. Lett. 118, 240403] Published Thu Jun 15, 2017

Long-Range Critical Exponents near the Short-Range Crossover


Author(s): Connor Behan, Leonardo Rastelli, Slava Rychkov, and Bernardo Zan
The d-dimensional long-range Ising model, defined by spin-spin interactions decaying with the distance as the power 1/r^{d+s}, admits a second-order phase transition with continuously varying critical exponents. At s=s_{*}, the phase transition crosses over to the usual short-range universality clas...
[Phys. Rev. Lett. 118, 241601] Published Thu Jun 15, 2017

Nucleon Structure Functions from Operator Product Expansion on the Lattice


Author(s): A. J. Chambers, R. Horsley, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, A. Schiller, K. Somfleth, R. D. Young, and J. M. Zanotti (QCDSF Collaboration)
Deep-inelastic scattering, in the laboratory and on the lattice, is most instructive for understanding how the nucleon is built from quarks and gluons. The long-term goal is to compute the associated structure functions from first principles. So far this has been limited to model calculations. In th...
[Phys. Rev. Lett. 118, 242001] Published Thu Jun 15, 2017

Quantum Synchronization Blockade: Energy Quantization Hinders Synchronization of Identical Oscillators


Author(s): Niels Lörch, Simon E. Nigg, Andreas Nunnenkamp, Rakesh P. Tiwari, and Christoph Bruder
Classically, the tendency towards spontaneous synchronization is strongest if the natural frequencies of the self-oscillators are as close as possible. We show that this wisdom fails in the deep quantum regime, where the uncertainty of amplitude narrows down to the level of single quanta. Under thes...
[Phys. Rev. Lett. 118, 243602] Published Thu Jun 15, 2017

Novel Superhard sp^{3} Carbon Allotrope from Cold-Compressed C_{70} Peapods


Author(s): Xigui Yang, Mingguang Yao, Xiangying Wu, Shijie Liu, Shuanglong Chen, Ke Yang, Ran Liu, Tian Cui, Bertil Sundqvist, and Bingbing Liu
Design and synthesis of new carbon allotropes have always been important topics in condensed matter physics and materials science. Here we report a new carbon allotrope, formed from cold-compressed C_{70} peapods, which most likely can be identified with a fully sp^{3}-bonded monoclinic structure, h...
[Phys. Rev. Lett. 118, 245701] Published Thu Jun 15, 2017

Multiple-Quantum Transitions and Charge-Induced Decoherence of Donor Nuclear Spins in Silicon


Author(s): David P. Franke, Moritz P. D. Pflüger, Kohei M. Itoh, and Martin S. Brandt
We study single- and multiquantum transitions of the nuclear spins of an ensemble of ionized arsenic donors in silicon and find quadrupolar effects on the coherence times, which we link to fluctuating electrical field gradients present after the application of light and bias voltage pulses. To deter...
[Phys. Rev. Lett. 118, 246401] Published Thu Jun 15, 2017

Nonequilibrium GW+EDMFT: Antiscreening and Inverted Populations from Nonlocal Correlations


Author(s): Denis Golež, Lewin Boehnke, Hugo U. R. Strand, Martin Eckstein, and Philipp Werner
We study the dynamics of screening in photodoped Mott insulators with long-ranged interactions using a nonequilibrium implementation of the GW plus extended dynamical mean-field theory formalism. Our study demonstrates that the complex interplay of the injected carriers with bosonic degrees of freed...
[Phys. Rev. Lett. 118, 246402] Published Thu Jun 15, 2017

Nonlinear Electron-Phonon Coupling in Doped Manganites


Author(s): V. Esposito, M. Fechner, R. Mankowsky, H. Lemke, M. Chollet, J. M. Glownia, M. Nakamura, M. Kawasaki, Y. Tokura, U. Staub, P. Beaud, and M. Först
We employ time-resolved resonant x-ray diffraction to study the melting of charge order and the associated insulator-to-metal transition in the doped manganite Pr_{0.5}Ca_{0.5}MnO_{3} after resonant excitation of a high-frequency infrared-active lattice mode. We find that the charge order reduces pr...
[Phys. Rev. Lett. 118, 247601] Published Thu Jun 15, 2017

Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe_{2}


Author(s): Hema C. P. Movva, Babak Fallahazad, Kyounghwan Kim, Stefano Larentis, Takashi Taniguchi, Kenji Watanabe, Sanjay K. Banerjee, and Emanuel Tutuc
We report a study of the quantum Hall states (QHS) of holes in mono- and bilayer WSe_{2}. The QHS sequence transitions between predominantly even and predominantly odd filling factors as the hole density is tuned in the range 1.6–12×10^{12}  cm^{−2}. Measurements in tilted magnetic fields reveal an ...
[Phys. Rev. Lett. 118, 247701] Published Thu Jun 15, 2017

Editorial: Supplemental Material or Joint Submission?


Author(s): Pierre Meystre
[Phys. Rev. Lett. 118, 240001] Published Wed Jun 14, 2017

Quantum Zeno Effects from Measurement Controlled Qubit-Bath Interactions


Author(s): P. M. Harrington, J. T. Monroe, and K. W. Murch
The Zeno and anti-Zeno effects are features of measurement-driven quantum evolution where frequent measurement inhibits or accelerates the decay of a quantum state. Either type of evolution can emerge depending on the system-environment interaction and measurement method. In this experiment, we use ...
[Phys. Rev. Lett. 118, 240401] Published Wed Jun 14, 2017

Solving the Quantum Many-Body Problem via Correlations Measured with a Momentum Microscope


Author(s): S. S. Hodgman, R. I. Khakimov, R. J. Lewis-Swan, A. G. Truscott, and K. V. Kheruntsyan

A microscope that images the momenta of atoms in a Bose-Einstein condensate could solve quantum many-body problems

[Phys. Rev. Lett. 118, 240402] Published Wed Jun 14, 2017

Shape Evolution in Neutron-Rich Krypton Isotopes Beyond N=60: First Spectroscopy of ^{98,100}Kr


Author(s): F. Flavigny et al.
We report on the first γ-ray spectroscopy of low-lying states in neutron-rich ^{98,100}Kr isotopes obtained from ^{99,101}Rb(p,2p) reactions at ∼220  MeV/nucleon. A reduction of the 2_{1}^{+} state energies beyond N=60 demonstrates a significant increase of deformation, shifted in neutron number com...
[Phys. Rev. Lett. 118, 242501] Published Wed Jun 14, 2017

X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer


Author(s): M. Endrizzi, F. A. Vittoria, L. Rigon, D. Dreossi, F. Iacoviello, P. R. Shearing, and A. Olivo
We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities. The method is based on strongly structuring the x-ray beam with an amplitude modulator, before it reaches the sample, and on a multiaperture analyzing element before dete...
[Phys. Rev. Lett. 118, 243902] Published Wed Jun 14, 2017

Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields


Author(s): Weiming An, Wei Lu, Chengkun Huang, Xinlu Xu, Mark J. Hogan, Chan Joshi, and Warren B. Mori
Plasma-based acceleration is being considered as the basis for building a future linear collider. Nonlinear plasma wakefields have ideal properties for accelerating and focusing electron beams. Preservation of the emittance of nano-Coulomb beams with nanometer scale matched spot sizes in these wakef...
[Phys. Rev. Lett. 118, 244801] Published Wed Jun 14, 2017

Filling-Fraction Fluctuation Leading to Glasslike Ultralow Thermal Conductivity in Caged Skutterudites


Author(s): Ren Wei, Geng Huiyuan, Zhang Zihao, and Zhang Lixia
It is generally believed that filling atoms randomly and uniformly distribute in caged crystals, such as skutterudite compounds. Here, we report first-principles and experimental discovery of a multiscale filling-fraction fluctuation in the RFe_{4}Sb_{12} system. La_{0.8}Ti_{0.1}Ga_{0.1}Fe_{4}Sb_{12...
[Phys. Rev. Lett. 118, 245901] Published Wed Jun 14, 2017

Real-Time Observation of Internal Motion within Ultrafast Dissipative Optical Soliton Molecules


Author(s): Katarzyna Krupa, K. Nithyanandan, Ugo Andral, Patrice Tchofo-Dinda, and Philippe Grelu

Pairs of solitons traveling in an optical fiber behave like a vibrating molecule.

[Phys. Rev. Lett. 118, 243901] Published Tue Jun 13, 2017

Searching for Primordial Black Holes in the Radio and X-Ray Sky


Author(s): Daniele Gaggero, Gianfranco Bertone, Francesca Calore, Riley M. T. Connors, Mark Lovell, Sera Markoff, and Emma Storm
We model the accretion of gas onto a population of massive primordial black holes in the Milky Way and compare the predicted radio and x-ray emission with observational data. We show that, under conservative assumptions on the accretion process, the possibility that O(10)M_{⊙} primordial black holes...
[Phys. Rev. Lett. 118, 241101] Published Mon Jun 12, 2017

Nuclear Magnetic Resonance Signature of the Spin-Nematic Phase in LiCuVO_{4} at High Magnetic Fields


Author(s): A. Orlova, E. L. Green, J. M. Law, D. I. Gorbunov, G. Chanda, S. Krämer, M. Horvatić, R. K. Kremer, J. Wosnitza, and G. L. J. A. Rikken

Nuclear magnetic resonance measurements strengthen the case that spins in a copper oxide exhibit nematic order similar to that found in liquid crystals.

[Phys. Rev. Lett. 118, 247201] Published Mon Jun 12, 2017

Intradomain Textures in Block Copolymers: Multizone Alignment and Biaxiality


Author(s): Ishan Prasad, Youngmi Seo, Lisa M. Hall, and Gregory M. Grason
Block copolymer (BCP) melt assembly has been studied for decades, focusing largely on self-organized spatial patterns of periodically ordered segment density. Here, we demonstrate that underlying the well-known composition profiles (i.e., ordered lamella, cylinders, spheres, and networks) are generi...
[Phys. Rev. Lett. 118, 247801] Published Mon Jun 12, 2017

Crossing Over from Attractive to Repulsive Interactions in a Tunneling Bosonic Josephson Junction


Author(s): G. Spagnolli, G. Semeghini, L. Masi, G. Ferioli, A. Trenkwalder, S. Coop, M. Landini, L. Pezzè, G. Modugno, M. Inguscio, A. Smerzi, and M. Fattori
We explore the interplay between tunneling and interatomic interactions in the dynamics of a bosonic Josephson junction. We tune the scattering length of an atomic ^{39}K Bose-Einstein condensate confined in a double-well trap to investigate regimes inaccessible to other superconducting or superflui...
[Phys. Rev. Lett. 118, 230403] Published Fri Jun 09, 2017

Rescattering Effects in the Hadronic-Light-by-Light Contribution to the Anomalous Magnetic Moment of the Muon


Author(s): Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura, and Peter Stoffer
We present a first model-independent calculation of ππ intermediate states in the hadronic-light-by-light (HLBL) contribution to the anomalous magnetic moment of the muon (g−2)_{μ} that goes beyond the scalar QED pion loop. To this end, we combine a recently developed dispersive description of the H...
[Phys. Rev. Lett. 118, 232001] Published Fri Jun 09, 2017

Effective Forces Between Quantum Bound States


Author(s): Alexander Rokash, Evgeny Epelbaum, Hermann Krebs, and Dean Lee
Recent ab initio lattice studies have found that the interactions between alpha particles (^{4}He nuclei) are sensitive to seemingly minor details of the nucleon-nucleon force, such as interaction locality. In order to uncover the essential physics of this puzzling phenomenon without unnecessary com...
[Phys. Rev. Lett. 118, 232502] Published Fri Jun 09, 2017

Recoil-Sensitive Lithium Interferometer without a Subrecoil Sample


Author(s): Kayleigh Cassella, Eric Copenhaver, Brian Estey, Yanying Feng, Chen Lai, and Holger Müller

A new atom interferometer works at less extreme temperatures and with lighter atoms than previous designs, opening up a new route to precision measurements of fundamental constants.

[Phys. Rev. Lett. 118, 233201] Published Fri Jun 09, 2017

Role of a Neighbor Ion in the Fragmentation Dynamics of Covalent Molecules


Author(s): A. Méry, A. N. Agnihotri, J. Douady, X. Fléchard, B. Gervais, S. Guillous, W. Iskandar, E. Jacquet, J. Matsumoto, J. Rangama, F. Ropars, C. P. Safvan, H. Shiromaru, D. Zanuttini, and A. Cassimi
Fragmentation of molecular nitrogen dimers (N_{2})_{2} induced by collision with low energy 90 keV Ar^{9+} ions is studied to evidence the influence of a molecular environment on the fragmentation dynamics of N_{2} cations. Following the capture of three or four electrons from the dimer, the three-b...
[Phys. Rev. Lett. 118, 233402] Published Fri Jun 09, 2017

Entanglement-Enhanced Phase Estimation without Prior Phase Information


Author(s): G. Colangelo, F. Martin Ciurana, G. Puentes, M. W. Mitchell, and R. J. Sewell
We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of ^{87}Rb atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the F_{y} and ...
[Phys. Rev. Lett. 118, 233603] Published Fri Jun 09, 2017

Radiation Pressure Cooling as a Quantum Dynamical Process


Author(s): Bing He, Liu Yang, Qing Lin, and Min Xiao
One of the most fundamental problems in optomechanical cooling is how small the thermal phonon number of a mechanical oscillator can be achieved under the radiation pressure of a proper cavity field. Different from previous theoretical predictions, which were based on an optomechanical system’s time...
[Phys. Rev. Lett. 118, 233604] Published Fri Jun 09, 2017

Optical Random Riemann Waves in Integrable Turbulence


Author(s): Stéphane Randoux, François Gustave, Pierre Suret, and Gennady El
We examine integrable turbulence (IT) in the framework of the defocusing cubic one-dimensional nonlinear Schrödinger equation. This is done theoretically and experimentally, by realizing an optical fiber experiment in which the defocusing Kerr nonlinearity strongly dominates linear dispersive effect...
[Phys. Rev. Lett. 118, 233901] Published Fri Jun 09, 2017

Superfluidlike Mass Flow Through 8  μm Thick Solid ^{4}He Samples


Author(s): Jaeho Shin, Duk Y. Kim, Ariel Haziot, and Moses H. W. Chan
We report the observation of superfluidlike mass flow through coin-shaped 8  μm thick solid ^{4}He samples sandwiched between superfluid leads. Mass flow is found from the melting pressure to at least 30 bar with a concomitant decrease in the onset temperature from 1 to 0.25 K. The mass-flow rate is...
[Phys. Rev. Lett. 118, 235301] Published Fri Jun 09, 2017

Origin of Structural Modulations in Ultrathin Fe Films on Cu(001)


Author(s): Xie Zhang, Tilmann Hickel, Jutta Rogal, and Jörg Neugebauer
Employing ab initio calculations we demonstrate that the complex structural modulations experimentally observed in ultrathin Fe films on Cu(001) originate from Fe bulk phases that arise under extreme deformations. Specifically, we show that the structural modulations correspond to the motifs observe...
[Phys. Rev. Lett. 118, 236101] Published Fri Jun 09, 2017

Emergent Weyl Fermion Excitations in TaP Explored by ^{181}Ta Quadrupole Resonance


Author(s): H. Yasuoka, T. Kubo, Y. Kishimoto, D. Kasinathan, M. Schmidt, B. Yan, Y. Zhang, H. Tou, C. Felser, A. P. Mackenzie, and M. Baenitz
The ^{181}Ta quadrupole resonance [nuclear quadrupole resonance (NQR)] technique is utilized to investigate the microscopic magnetic properties of the Weyl semimetal TaP. We find three zero-field NQR signals associated with the transition between the quadrupole split levels for Ta with I=7/2 nuclear...
[Phys. Rev. Lett. 118, 236403] Published Fri Jun 09, 2017

Novel Metal-Insulator Transition at the SmTiO_{3}/SrTiO_{3} Interface


Author(s): Kaveh Ahadi and Susanne Stemmer
We report on a metal-insulator transition (MIT) that is observed in an electron system at the SmTiO_{3}/SrTiO_{3} interface. This MIT is characterized by an abrupt transition at a critical temperature, below which the resistance changes by more than an order of magnitude. The temperature of the tran...
[Phys. Rev. Lett. 118, 236803] Published Fri Jun 09, 2017

Nature of the Spin Liquid Ground State in a Breathing Kagome Compound Studied by NMR and Series Expansion


Author(s): J.-C. Orain, B. Bernu, P. Mendels, L. Clark, F. H. Aidoudi, P. Lightfoot, R. E. Morris, and F. Bert
In the vanadium oxyfluoride compound (NH_{4})_{2}[C_{7}H_{14}N][V_{7}O_{6}F_{18}] (DQVOF), the V^{4+} (3d^{1}, S=1/2) ions realize a unique, highly frustrated breathing kagome lattice composed of alternately sized, corner-sharing equilateral triangles. Here we present an ^{17}O NMR study of DQVOF, w...
[Phys. Rev. Lett. 118, 237203] Published Fri Jun 09, 2017

Nuclear Resonant Surface Diffraction of Synchrotron Radiation


Author(s): Kai Schlage, Liudmila Dzemiantsova, Lars Bocklage, Hans-Christian Wille, Matthias Pues, Guido Meier, and Ralf Röhlsberger
Nuclear resonant x-ray diffraction in grazing incidence geometry is used to determine the lateral magnetic configuration in a one-dimensional lattice of ferromagnetic nanostripes. During magnetic reversal, strong nuclear superstructure diffraction peaks appear in addition to the electronic ones due ...
[Phys. Rev. Lett. 118, 237204] Published Fri Jun 09, 2017

Limitations of Particle-Based Spasers


Author(s): Günter Kewes, Kathrin Herrmann, Rogelio Rodríguez-Oliveros, Alexander Kuhlicke, Oliver Benson, and Kurt Busch
We present a semiclassical analytic model for spherical core-shell surface plasmon lasers. Within this model, we drop the widely used one-mode approximations in favor of fully electromagnetic Mie theory. This allows for incorporation of realistic gain relaxation rates that so far are massively under...
[Phys. Rev. Lett. 118, 237402] Published Fri Jun 09, 2017

Dielectric Anisotropy of the GaP/Si(001) Interface from First-Principles Theory


Author(s): Pankaj Kumar and Charles H. Patterson
First-principles calculations of the dielectric anisotropy of the GaP/Si(001) interface are compared to the anisotropy extracted from reflectance measurements on GaP thin films on Si(001) [O. Supplie et al., Phys. Rev. B 86, 035308 (2012)]. Optical excitations from two states localized in several Si...
[Phys. Rev. Lett. 118, 237403] Published Fri Jun 09, 2017