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Preview: Recent Articles in Phys. Rev. Lett.

Recent Articles in Phys. Rev. Lett.

Recent articles in Physical Review Letters

Published: 2017-05-23T11:01:00-04:00


Quasiparticle Energy in a Strongly Interacting Homogeneous Bose-Einstein Condensate


Author(s): Raphael Lopes, Christoph Eigen, Adam Barker, Konrad G. H. Viebahn, Martin Robert-de-Saint-Vincent, Nir Navon, Zoran Hadzibabic, and Robert P. Smith
Using two-photon Bragg spectroscopy, we study the energy of particlelike excitations in a strongly interacting homogeneous Bose-Einstein condensate, and observe dramatic deviations from Bogoliubov theory. In particular, at large scattering length a the shift of the excitation resonance from the free…
[Phys. Rev. Lett. 118, 210401] Published Tue May 23, 2017

Impact of Next-to-Leading Order Contributions to Cosmic Microwave Background Lensing


Author(s): Giovanni Marozzi, Giuseppe Fanizza, Enea Di Dio, and Ruth Durrer
In this Letter we study the impact on cosmological parameter estimation, from present and future surveys, due to lensing corrections on cosmic microwave background temperature and polarization anisotropies beyond leading order. In particular, we show how post-Born corrections, large-scale structure …
[Phys. Rev. Lett. 118, 211301] Published Tue May 23, 2017

Reduced Transition Probabilities for the Gamma Decay of the 7.8 eV Isomer in ^{229} Th


Author(s): Nikolay Minkov and Adriana Pálffy
The reduced magnetic dipole and electric quadrupole transition probabilities for the radiative decay of the ^{229}Th 7.8  eV isomer to the ground state are predicted within a detailed nuclear-structure model approach. We show that the presence and decay of this isomer can only be accounted for by th…
[Phys. Rev. Lett. 118, 212501] Published Tue May 23, 2017

Chirp Mitigation of Plasma-Accelerated Beams by a Modulated Plasma Density


Author(s): R. Brinkmann, N. Delbos, I. Dornmair, M. Kirchen, R. Assmann, C. Behrens, K. Floettmann, J. Grebenyuk, M. Gross, S. Jalas, T. Mehrling, A. Martinez de la Ossa, J. Osterhoff, B. Schmidt, V. Wacker, and A. R. Maier
Plasma-based accelerators offer the possibility to drive future compact light sources and high-energy physics applications. Achieving good beam quality, especially a small beam energy spread, is still one of the major challenges. Here, we propose to use a periodically modulated plasma density to sha…
[Phys. Rev. Lett. 118, 214801] Published Tue May 23, 2017

Origin of Granular Capillarity Revealed by Particle-Based Simulations


Author(s): Fengxian Fan, Eric J. R. Parteli, and Thorsten Pöschel

Numerical simulations show that a previously observed capillary-like action in vibrating grain systems is due to convective motion of the grains.

[Phys. Rev. Lett. 118, 218001] Published Tue May 23, 2017

Quantum Loop Topography for Machine Learning


Author(s): Yi Zhang and Eun-Ah Kim

A new machine-learning algorithm based on a neural network can tell a topological phase of matter from a conventional one.

[Phys. Rev. Lett. 118, 216401] Published Mon May 22, 2017

Scheme for Detection of Single-Molecule Radical Pair Reaction Using Spin in Diamond


Author(s): Haibin Liu, Martin B. Plenio, and Jianming Cai
The radical pair reaction underlies the magnetic field sensitivity of chemical reactions and is suggested to play an important role in both chemistry and biology. Current experimental evidence is based on ensemble measurements; however, the ability to probe the radical pair reaction at the single-mo…
[Phys. Rev. Lett. 118, 200402] Published Fri May 19, 2017

Phase Transitions in Definite Total Spin States of Two-Component Fermi Gases


Author(s): Vladimir A. Yurovsky
Second-order phase transitions have no latent heat and are characterized by a change in symmetry. In addition to the conventional symmetric and antisymmetric states under permutations of bosons and fermions, mathematical group-representation theory allows for non-Abelian permutation symmetry. Such s…
[Phys. Rev. Lett. 118, 200403] Published Fri May 19, 2017

Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation


Author(s): F. Iemini, L. Mazza, L. Fallani, P. Zoller, R. Fazio, and M. Dalmonte
We show how angular momentum conservation can stabilize a symmetry-protected quasitopological phase of matter supporting Majorana quasiparticles as edge modes in one-dimensional cold atom gases. We investigate a number-conserving four-species Hubbard model in the presence of spin-orbit coupling. The…
[Phys. Rev. Lett. 118, 200404] Published Fri May 19, 2017

Additive Classical Capacity of Quantum Channels Assisted by Noisy Entanglement


Author(s): Quntao Zhuang, Elton Yechao Zhu, and Peter W. Shor
We give a capacity formula for the classical information transmission over a noisy quantum channel, with separable encoding by the sender and limited resources provided by the receiver’s preshared ancilla. Instead of a pure state, we consider the signal-ancilla pair in a mixed state, purified by a “…
[Phys. Rev. Lett. 118, 200503] Published Fri May 19, 2017

Laser-Induced Rotation of Iodine Molecules in Helium Nanodroplets: Revivals and Breaking Free


Author(s): Benjamin Shepperson, Anders A. Søndergaard, Lars Christiansen, Jan Kaczmarczyk, Robert E. Zillich, Mikhail Lemeshko, and Henrik Stapelfeldt
Rotation of molecules embedded in helium nanodroplets is explored by a combination of fs laser-induced alignment experiments and angulon quasiparticle theory. We demonstrate that at low fluence of the fs alignment pulse, the molecule and its solvation shell can be set into coherent collective rotati…
[Phys. Rev. Lett. 118, 203203] Published Fri May 19, 2017

Collimated Propagation of Fast Electron Beams Accelerated by High-Contrast Laser Pulses in Highly Resistive Shocked Carbon


Author(s): X. Vaisseau, A. Morace, M. Touati, M. Nakatsutsumi, S. D. Baton, S. Hulin, Ph. Nicolaï, R. Nuter, D. Batani, F. N. Beg, J. Breil, R. Fedosejevs, J.-L. Feugeas, P. Forestier-Colleoni, C. Fourment, S. Fujioka, L. Giuffrida, S. Kerr, H. S. McLean, H. Sawada, V. T. Tikhonchuk, and J. J. Santos
Collimated transport of ultrahigh intensity electron current was observed in cold and in laser-shocked vitreous carbon, in agreement with simulation predictions. The fast electron beams were created by coupling high-intensity and high-contrast laser pulses onto copper-coated cones drilled into the c…
[Phys. Rev. Lett. 118, 205001] Published Fri May 19, 2017

Local Structure and Short-Range Order in a NiCoCr Solid Solution Alloy


Author(s): F. X. Zhang, Shijun Zhao, Ke Jin, H. Xue, G. Velisa, H. Bei, R. Huang, J. Y. P. Ko, D. C. Pagan, J. C. Neuefeind, W. J. Weber, and Yanwen Zhang
Multielement solid solution alloys are intrinsically disordered on the atomic scale, and many of their advanced properties originate from the local structural characteristics. The local structure of a NiCoCr solid solution alloy is measured with x-ray or neutron total scattering and extended x-ray a…
[Phys. Rev. Lett. 118, 205501] Published Fri May 19, 2017

Transmodal Fabry-Pérot Resonance: Theory and Realization with Elastic Metamaterials


Author(s): Joshua Minwoo Kweun, Hyung Jin Lee, Joo Hwan Oh, Hong Min Seung, and Yoon Young Kim

New filter allows shear waves to be produced efficiently, which could lead to higher resolution ultrasound images.

[Phys. Rev. Lett. 118, 205901] Published Fri May 19, 2017

Disruption of the Accidental Dirac Semimetal State in ZrTe_{5} under Hydrostatic Pressure


Author(s): J. L. Zhang, C. Y. Guo, X. D. Zhu, L. Ma, G. L. Zheng, Y. Q. Wang, L. Pi, Y. Chen, H. Q. Yuan, and M. L. Tian
We study the effect of hydrostatic pressure on the magnetotransport properties of zirconium pentatelluride. The magnitude of resistivity anomaly gets enhanced with increasing pressure, but the transition temperature T^{*} is insensitive to it up to 2.5 GPa. In the case of H∥b, the quasilinear magnet…
[Phys. Rev. Lett. 118, 206601] Published Fri May 19, 2017

Particle-Hole Duality in the Lowest Landau Level


Author(s): Dung Xuan Nguyen, Tankut Can, and Andrey Gromov
We derive a number of exact relations between response functions of holomorphic, chiral fractional quantum Hall states and their particle-hole (PH) conjugates. These exact relations allow one to calculate the Hall conductivity, Hall viscosity, various Berry phases, and the static structure factor of…
[Phys. Rev. Lett. 118, 206602] Published Fri May 19, 2017

Lateral p−n Junction in an Inverted InAs/GaSb Double Quantum Well


Author(s): Matija Karalic, Christopher Mittag, Thomas Tschirky, Werner Wegscheider, Klaus Ensslin, and Thomas Ihn

The properties of a p-n junction in a semiconductor structure in the quantum spin Hall insulating regime are probed experimentally. This device could enable controlled study of the interplay between the quantum spin Hall and quantum Hall states.

[Phys. Rev. Lett. 118, 206801] Published Fri May 19, 2017

Non-Abelian Majorana Modes Protected by an Emergent Second Chern Number


Author(s): Cheung Chan and Xiong-Jun Liu
The search for topological superconductors and non-Abelian Majorana modes ranks among the most fascinating topics in condensed matter physics. There now exist several fundamental superconducting phases which host symmetry protected or chiral Majorana modes, of which the chiral modes are protected by…
[Phys. Rev. Lett. 118, 207002] Published Fri May 19, 2017

Dynamical Defects in Rotating Magnetic Skyrmion Lattices


Author(s): S. Pöllath, J. Wild, L. Heinen, T. N. G. Meier, M. Kronseder, L. Tutsch, A. Bauer, H. Berger, C. Pfleiderer, J. Zweck, A. Rosch, and C. H. Back

Skyrmions in lattices can be considered as point-like particles according to new experiments and theory that track the motion of lattice defects and domain boundaries.

[Phys. Rev. Lett. 118, 207205] Published Fri May 19, 2017

Spin ice Thin Film: Surface Ordering, Emergent Square ice, and Strain Effects


Author(s): L. D. C. Jaubert, T. Lin, T. S. Opel, P. C. W. Holdsworth, and M. J. P. Gingras
Motivated by recent realizations of Dy_{2}Ti_{2}O_{7} and Ho_{2}Ti_{2}O_{7} spin ice thin films, and more generally by the physics of confined gauge fields, we study a model spin ice thin film with surfaces perpendicular to the [001] cubic axis. The resulting open boundaries make half of the bonds o…
[Phys. Rev. Lett. 118, 207206] Published Fri May 19, 2017

Singlet Orbital Ordering in Bilayer Sr_{3} Cr_{2} O_{7}


Author(s): Justin Jeanneau, Pierre Toulemonde, Gyorgy Remenyi, André Sulpice, Claire Colin, Vivian Nassif, Emmanuelle Suard, Eduardo Salas Colera, Germán R. Castro, Frederic Gay, Corina Urdaniz, Ruben Weht, Clement Fevrier, Arnaud Ralko, Claudine Lacroix, Armando A. Aligia, and Manuel Núñez-Regueiro
We perform an extensive study of Sr_{3}Cr_{2}O_{7}, the n=2 member of the Ruddlesden-Popper Sr_{n+1}Cr_{n}O_{3n+1} system. An antiferromagnetic ordering is clearly visible in the magnetization and the specific heat, which yields a huge transition entropy, Rln(6). By neutron diffraction as a function…
[Phys. Rev. Lett. 118, 207207] Published Fri May 19, 2017

Superconductivity Provides Access to the Chiral Magnetic Effect of an Unpaired Weyl Cone


Author(s): T. E. O’Brien, C. W. J. Beenakker, and İ. Adagideli
The massless fermions of a Weyl semimetal come in two species of opposite chirality, in two cones of the band structure. As a consequence, the current j induced in one Weyl cone by a magnetic field B [the chiral magnetic effect (CME)] is canceled in equilibrium by an opposite current in the other co…
[Phys. Rev. Lett. 118, 207701] Published Fri May 19, 2017

Accretion Dynamics on Wet Granular Materials


Author(s): Guillaume Saingier, Alban Sauret, and Pierre Jop

The probability that a jet of dry grains will stick to a wet granular pile depends on the amount of liquid available at the pile’s surface.

[Phys. Rev. Lett. 118, 208001] Published Fri May 19, 2017

Shape and Dynamics of Adhesive Cells: Mechanical Response of Open Systems


Author(s): Yuehua Yang and Hongyuan Jiang
Cell adhesion is an essential biological process. However, previous theoretical and experimental studies ignore a key variable, the changes of cellular volume and pressure, during the dynamic adhesion process. Here, we treat cells as open systems and propose a theoretical framework to investigate ho…
[Phys. Rev. Lett. 118, 208102] Published Fri May 19, 2017

Zeno Hall Effect


Author(s): Zongping Gong, Sho Higashikawa, and Masahito Ueda

The quantum Zeno effect is predicted to give rise to Hall-effect-like behavior for wavepackets in an ultracold condensate.

[Phys. Rev. Lett. 118, 200401] Published Thu May 18, 2017

Surface States in Holographic Weyl Semimetals


Author(s): Markus Heinrich, Amadeo Jiménez-Alba, Sebastian Moeckel, and Martin Ammon
We study the surface states of a strongly coupled Weyl semimetal within holography. By explicit numerical computation of an inhomogeneous holographic Weyl semimetal, we observe the appearance of an electric current restricted to the surface in the presence of an electric chemical potential. The inte…
[Phys. Rev. Lett. 118, 201601] Published Thu May 18, 2017

High-Harmonic Generation Enhanced by Dynamical Electron Correlation


Author(s): Iliya Tikhomirov, Takeshi Sato, and Kenichi L. Ishikawa
We theoretically study multielectron effects in high-harmonic generation (HHG), using all-electron first-principles simulations for a one-dimensional model atom. In addition to the usual plateau and cutoff (from a cation in the present case, since the neutral is immediately ionized), we find a promi…
[Phys. Rev. Lett. 118, 203202] Published Thu May 18, 2017

Synchronization Dynamics in a Designed Open System


Author(s): Nobuhiko Yokoshi, Kazuki Odagiri, Akira Ishikawa, and Hajime Ishihara
We theoretically propose a unifying expression for synchronization dynamics between two-level constituents. Although synchronization phenomena require some substantial mediators, the distinct repercussions of their propagation delays remain obscure, especially in open systems. Our scheme directly in…
[Phys. Rev. Lett. 118, 203601] Published Thu May 18, 2017

X-ray Phase-Contrast Imaging and Metrology through Unified Modulated Pattern Analysis


Author(s): Marie-Christine Zdora, Pierre Thibault, Tunhe Zhou, Frieder J. Koch, Jenny Romell, Simone Sala, Arndt Last, Christoph Rau, and Irene Zanette
We present a method for x-ray phase-contrast imaging and metrology applications based on the sample-induced modulation and subsequent computational demodulation of a random or periodic reference interference pattern. The proposed unified modulated pattern analysis (UMPA) technique is a versatile app…
[Phys. Rev. Lett. 118, 203903] Published Thu May 18, 2017

Achieving Stable Radiation Pressure Acceleration of Heavy Ions via Successive Electron Replenishment from Ionization of a High-Z Material Coating


Author(s): X. F. Shen, B. Qiao, H. Zhang, S. Kar, C. T. Zhou, H. X. Chang, M. Borghesi, and X. T. He
A method to achieve stable radiation pressure acceleration (RPA) of heavy ions from laser-irradiated ultrathin foils is proposed, where a high-Z material coating in front is used. The coated high-Z material, acting as a moving electron repository, continuously replenishes the accelerating heavy ion …
[Phys. Rev. Lett. 118, 204802] Published Thu May 18, 2017

Dimensional Crossover in a Charge Density Wave Material Probed by Angle-Resolved Photoemission Spectroscopy


Author(s): C. W. Nicholson, C. Berthod, M. Puppin, H. Berger, M. Wolf, M. Hoesch, and C. Monney
High-resolution angle-resolved photoemission spectroscopy data reveal evidence of a crossover from one-dimensional (1D) to three-dimensional (3D) behavior in the prototypical charge density wave (CDW) material NbSe_{3}. In the low-temperature 3D regime, gaps in the electronic structure are observed …
[Phys. Rev. Lett. 118, 206401] Published Thu May 18, 2017

Symmetry-Enforced Line Nodes in Unconventional Superconductors


Author(s): T. Micklitz and M. R. Norman
We classify line nodes in superconductors with strong spin-orbit interactions and time-reversal symmetry, where the latter may include nonprimitive translations in the magnetic Brillouin zone to account for coexistence with antiferromagnetic order. We find four possible combinations of irreducible r…
[Phys. Rev. Lett. 118, 207001] Published Thu May 18, 2017

Coherent Two-Dimensional Terahertz Magnetic Resonance Spectroscopy of Collective Spin Waves


Author(s): Jian Lu, Xian Li, Harold Y. Hwang, Benjamin K. Ofori-Okai, Takayuki Kurihara, Tohru Suemoto, and Keith A. Nelson
We report a demonstration of two-dimensional (2D) terahertz (THz) magnetic resonance spectroscopy using the magnetic fields of two time-delayed THz pulses. We apply the methodology to directly reveal the nonlinear responses of collective spin waves (magnons) in a canted antiferromagnetic crystal. Th…
[Phys. Rev. Lett. 118, 207204] Published Thu May 18, 2017

Dominance of Metric Correlations in Two-Dimensional Neuronal Cultures Described through a Random Field Ising Model


Author(s): Lluís Hernández-Navarro, Javier G. Orlandi, Benedetta Cerruti, Eduard Vives, and Jordi Soriano
We introduce a novel random field Ising model, grounded on experimental observations, to assess the importance of metric correlations in cortical circuits in vitro. Metric correlations arise from both the finite axonal length and the heterogeneity in the spatial arrangement of neurons. The experimen…
[Phys. Rev. Lett. 118, 208101] Published Thu May 18, 2017

Absolutely Maximally Entangled States of Seven Qubits Do Not Exist


Author(s): Felix Huber, Otfried Gühne, and Jens Siewert
Pure multiparticle quantum states are called absolutely maximally entangled if all reduced states obtained by tracing out at least half of the particles are maximally mixed. We provide a method to characterize these states for a general multiparticle system. With that, we prove that a seven-qubit st…
[Phys. Rev. Lett. 118, 200502] Published Wed May 17, 2017

Gamma Decay of Unbound Neutron-Hole States in ^{133} Sn


Author(s): V. Vaquero et al.
Excited states in the nucleus ^{133}Sn, with one neutron outside the double magic ^{132}Sn core, were populated following one-neutron knockout from a ^{134}Sn beam on a carbon target at relativistic energies at the Radioactive Isotope Beam Factory at RIKEN. Besides the γ rays emitted in the decay of…
[Phys. Rev. Lett. 118, 202502] Published Wed May 17, 2017

Laser-Controlled Torsions: Four-Dimensional Theory and the Validity of Reduced Dimensionality Models


Author(s): Thomas Grohmann, Monika Leibscher, and Tamar Seideman
A multitude of possible applications along with unique coherence, chirality, and symmetry properties makes the control of molecular torsion with moderately strong, nonresonant laser pulses a fascinating subject. A description of combined rotation and torsion requires at least four angular degrees of…
[Phys. Rev. Lett. 118, 203201] Published Wed May 17, 2017

Elastic Vector Solitons in Soft Architected Materials


Author(s): B. Deng, J. R. Raney, V. Tournat, and K. Bertoldi

Experiments, simulations, and theory demonstrate that elastic vector solitons can propagate in a soft structured material consisting of a network of squares connected by thin and deformable ligaments.

[Phys. Rev. Lett. 118, 204102] Published Wed May 17, 2017

Possible Precise Measurement of Delbrück Scattering Using Polarized Photon Beams


Author(s): James K. Koga and Takehito Hayakawa

Polarized gamma rays could be used to measure how gamma-ray photons scatter off the virtual particles that make up the quantum vacuum.

[Phys. Rev. Lett. 118, 204801] Published Wed May 17, 2017

Transfer of Magnetic Order and Anisotropy through Epitaxial Integration of 3d and 4f Spin Systems


Author(s): M. Bluschke, A. Frano, E. Schierle, M. Minola, M. Hepting, G. Christiani, G. Logvenov, E. Weschke, E. Benckiser, and B. Keimer
Resonant x-ray scattering at the Dy M_{5} and Ni L_{3} absorption edges was used to probe the temperature and magnetic field dependence of magnetic order in epitaxial LaNiO_{3}−DyScO_{3} superlattices. For superlattices with 2 unit cell thick LaNiO_{3} layers, a commensurate spiral state develops in…
[Phys. Rev. Lett. 118, 207203] Published Wed May 17, 2017

Security of Continuous-Variable Quantum Key Distribution via a Gaussian de Finetti Reduction


Author(s): Anthony Leverrier
Establishing the security of continuous-variable quantum key distribution against general attacks in a realistic finite-size regime is an outstanding open problem in the field of theoretical quantum cryptography if we restrict our attention to protocols that rely on the exchange of coherent states. …
[Phys. Rev. Lett. 118, 200501] Published Tue May 16, 2017

Multiple-Star System Adaptive Vortex Coronagraphy Using a Liquid Crystal Light Valve


Author(s): Artur Aleksanyan, Nina Kravets, and Etienne Brasselet

A proposed telescope update could enable incoming light from multiple stars to be simultaneously blocked, making it easier to image exoplanets orbiting two or more stars.

[Phys. Rev. Lett. 118, 203902] Published Tue May 16, 2017

Power Spectrum of Long Eigenlevel Sequences in Quantum Chaotic Systems


Author(s): Roman Riser, Vladimir Al. Osipov, and Eugene Kanzieper

A parameter-free, non-perturbative prediction of the power spectrum of energy level fluctuations is expected to apply universally for quantum chaotic systems.

[Phys. Rev. Lett. 118, 204101] Published Tue May 16, 2017

Spin-Orbit Coupling Controlled J=3/2 Electronic Ground State in 5d^{3} Oxides


Author(s): A. E. Taylor, S. Calder, R. Morrow, H. L. Feng, M. H. Upton, M. D. Lumsden, K. Yamaura, P. M. Woodward, and A. D. Christianson
Entanglement of spin and orbital degrees of freedom drives the formation of novel quantum and topological physical states. Here we report resonant inelastic x-ray scattering measurements of the transition metal oxides Ca_{3}LiOsO_{6} and Ba_{2}YOsO_{6}, which reveals a dramatic spitting of the t_{2g…
[Phys. Rev. Lett. 118, 207202] Published Tue May 16, 2017

Conformational Asymmetry and Quasicrystal Approximants in Linear Diblock Copolymers


Author(s): Morgan W. Schulze, Ronald M. Lewis, III, James H. Lettow, Robert J. Hickey, Timothy M. Gillard, Marc A. Hillmyer, and Frank S. Bates
Small angle x-ray scattering experiments on three model low molar mass diblock copolymer systems containing minority polylactide and majority hydrocarbon blocks demonstrate that conformational asymmetry stabilizes the Frank-Kasper σ phase. Differences in block flexibility compete with space filling …
[Phys. Rev. Lett. 118, 207801] Published Tue May 16, 2017

Social Cooperation and Disharmony in Communities Mediated through Common Pool Resource Exploitation


Author(s): H. S. Sugiarto, J. S. Lansing, N. N. Chung, C. H. Lai, S. A. Cheong, and L. Y. Chew
It was theorized that when a society exploits a shared resource, the system can undergo extreme phase transition from full cooperation in abiding by a social agreement, to full defection from it. This was shown to happen in an integrated society with complex social relationships. However, real-world…
[Phys. Rev. Lett. 118, 208301] Published Tue May 16, 2017

Comment on “Linear Scaling of the Exciton Binding Energy versus the Band Gap of Two-Dimensional Materials”


Author(s): Mingliang Zhang, Ling-Yi Huang, Xu Zhang, and Gang Lu
[Phys. Rev. Lett. 118, 209701] Published Tue May 16, 2017

Choi et al. Reply:


Author(s): Jin-Ho Choi, Ping Cui, Haiping Lan, and Zhenyu Zhang
[Phys. Rev. Lett. 118, 209702] Published Tue May 16, 2017

Nuclear Physics Around the Unitarity Limit


Author(s): Sebastian König, Harald W. Grießhammer, H.-W. Hammer, and U. van Kolck

Many features of three- and four-nucleon nuclei are well explained by a perturbative expansion around the unitarity limit. It is conjectured that this approach could work for heavier nuclei as well.

[Phys. Rev. Lett. 118, 202501] Published Mon May 15, 2017

Enhancing Near-Field Radiative Heat Transfer with Si-based Metasurfaces


Author(s): V. Fernández-Hurtado, F. J. García-Vidal, Shanhui Fan, and J. C. Cuevas
We demonstrate in this work that the use of metasurfaces provides a viable strategy to largely tune and enhance near-field radiative heat transfer between extended structures. In particular, using a rigorous coupled wave analysis, we predict that Si-based metasurfaces featuring two-dimensional perio…
[Phys. Rev. Lett. 118, 203901] Published Mon May 15, 2017

Electron and Ion Dynamics of the Solar Wind Interaction with a Weakly Outgassing Comet


Author(s): Jan Deca, Andrey Divin, Pierre Henri, Anders Eriksson, Stefano Markidis, Vyacheslav Olshevsky, and Mihály Horányi

Detailed 3D simulations of a comet’s environment reveal the rich dynamics of ions and electrons observed by the Rosetta spacecraft around comet 67P.

[Phys. Rev. Lett. 118, 205101] Published Mon May 15, 2017

Electrothermal Transistor Effect and Cyclic Electronic Currents in Multithermal Charge Transfer Networks


Author(s): Galen T. Craven and Abraham Nitzan
A theory is developed to describe the coupled transport of energy and charge in networks of electron donor-acceptor sites which are seated in a thermally heterogeneous environment, where the transfer kinetics are dominated by Marcus-type hopping rates. It is found that the coupling of heat and charg…
[Phys. Rev. Lett. 118, 207201] Published Mon May 15, 2017

Inductive Supervised Quantum Learning


Author(s): Alex Monràs, Gael Sentís, and Peter Wittek
In supervised learning, an inductive learning algorithm extracts general rules from observed training instances, then the rules are applied to test instances. We show that this splitting of training and application arises naturally, in the classical setting, from a simple independence requirement wi…
[Phys. Rev. Lett. 118, 190503] Published Fri May 12, 2017

Typical Relaxation of Isolated Many-Body Systems Which Do Not Thermalize


Author(s): Ben N. Balz and Peter Reimann
We consider isolated many-body quantum systems which do not thermalize; i.e., expectation values approach an (approximately) steady longtime limit which disagrees with the microcanonical prediction of equilibrium statistical mechanics. A general analytical theory is worked out for the typical tempor…
[Phys. Rev. Lett. 118, 190601] Published Fri May 12, 2017

Strain-Induced Gauge Field and Landau Levels in Acoustic Structures


Author(s): Zhaoju Yang, Fei Gao, Yahui Yang, and Baile Zhang
The emerging field of topological acoustics that explores novel gauge-field-related phenomena for sound has drawn attention in recent years. However, previous approaches constructing a synthetic gauge field for sound predominantly relied on a periodic system, being unable to form a uniform effective…
[Phys. Rev. Lett. 118, 194301] Published Fri May 12, 2017

Oxysulfide LiAlSO: A Lithium Superionic Conductor from First Principles


Author(s): Xuelong Wang, Ruijuan Xiao, Hong Li, and Liquan Chen

A candidate for a potentially superior lithium battery material is identified by crystal structure calculations.

[Phys. Rev. Lett. 118, 195901] Published Fri May 12, 2017

Resonances in the Field-Angle-Resolved Thermal Conductivity of CeCoIn_{5}


Author(s): Duk Y. Kim, Shi-Zeng Lin, Franziska Weickert, Eric D. Bauer, Filip Ronning, J. D. Thompson, and Roman Movshovich
The thermal conductivity measurement in a rotating magnetic field is a powerful probe of the structure of the superconducting energy gap. We present high-precision measurements of the low-temperature thermal conductivity in the unconventional heavy-fermion superconductor CeCoIn_{5}, with the heat cu…
[Phys. Rev. Lett. 118, 197001] Published Fri May 12, 2017

Velocity Distribution of a Homogeneously Driven Two-Dimensional Granular Gas


Author(s): Christian Scholz and Thorsten Pöschel

Measurements of a two-dimensional “gas” made up of particles that spin when shaken bolsters a gas-like theory for granular materials.

[Phys. Rev. Lett. 118, 198003] Published Fri May 12, 2017

Solitons in Bose-Einstein Condensates with Helicoidal Spin-Orbit Coupling


Author(s): Yaroslav V. Kartashov and Vladimir V. Konotop
We report on the existence and stability of freely moving solitons in a spatially inhomogeneous Bose-Einstein condensate with helicoidal spin-orbit (SO) coupling. In spite of the periodically varying parameters, the system allows for the existence of stable propagating solitons. Such states are foun…
[Phys. Rev. Lett. 118, 190401] Published Thu May 11, 2017

Experimental Demonstration of a Cheap and Accurate Phase Estimation


Author(s): Kenneth Rudinger, Shelby Kimmel, Daniel Lobser, and Peter Maunz
We demonstrate an experimental implementation of robust phase estimation (RPE) to learn the phase of a single-qubit rotation on a trapped Yb^{+} ion qubit. We show this phase can be estimated with an uncertainty below 4×10^{−4}  rad using as few as 176 total experimental samples, and our estimates e…
[Phys. Rev. Lett. 118, 190502] Published Thu May 11, 2017

Measurement of the B_{s}^{0} →μ^{+} μ^{−} Branching Fraction and Effective Lifetime and Search for B^{0} →μ^{+} μ^{−} Decays


Author(s): R. Aaij et al. (LHCb Collaboration)

The LHCb Collaboration reports the first observation of the Bs0μ+μ decay from a single experiment. The result is the the most precise measurement of its branching fraction to date.

[Phys. Rev. Lett. 118, 191801] Published Thu May 11, 2017

Universal Self-Similar Scaling of Spatial Wilson Loops Out of Equilibrium


Author(s): J. Berges, M. Mace, and S. Schlichting
We investigate strongly correlated non-Abelian plasmas out of equilibrium. Based on numerical simulations, we establish a self-similar scaling property for the time evolution of spatial Wilson loops that characterizes a universal state of matter far from equilibrium. Most remarkably, it exhibits a g…
[Phys. Rev. Lett. 118, 192005] Published Thu May 11, 2017

Experimental Determination of η/s for Finite Nuclear Matter


Author(s): Debasish Mondal, Deepak Pandit, S. Mukhopadhyay, Surajit Pal, Balaram Dey, Srijit Bhattacharya, A. De, Soumik Bhattacharya, S. Bhattacharyya, Pratap Roy, K. Banerjee, and S. R. Banerjee
We present, for the first time, simultaneous determination of shear viscosity (η) and entropy density (s) and thus, η/s for equilibrated nuclear systems from A∼30 to A∼208 at different temperatures. At finite temperature, η is estimated by utilizing the γ decay of the isovector giant dipole resonanc…
[Phys. Rev. Lett. 118, 192501] Published Thu May 11, 2017

Enhanced Chiral Discriminatory van der Waals Interactions Mediated by Chiral Surfaces


Author(s): Pablo Barcellona, Hassan Safari, A. Salam, and Stefan Yoshi Buhmann
We predict a discriminatory interaction between a chiral molecule and an achiral molecule which is mediated by a chiral body. To achieve this, we generalize the van der Waals interaction potential between two ground-state molecules with electric, magnetic, and chiral response to nontrivial environme…
[Phys. Rev. Lett. 118, 193401] Published Thu May 11, 2017

Dispersive Time-Delay Dynamical Systems


Author(s): Alexander Pimenov, Svetlana Slepneva, Guillaume Huyet, and Andrei G. Vladimirov
We present a theoretical approach to investigate the effect of dispersion in dynamical systems commonly described by time-delay models. The introduction of a polarization equation provides a means to introduce dispersion as a distributed delay term. The expansion of this term in power series, as usu…
[Phys. Rev. Lett. 118, 193901] Published Thu May 11, 2017

Relativistic Electron Streaming Instabilities Modulate Proton Beams Accelerated in Laser-Plasma Interactions


Author(s): S. Göde, C. Rödel, K. Zeil, R. Mishra, M. Gauthier, F.-E. Brack, T. Kluge, M. J. MacDonald, J. Metzkes, L. Obst, M. Rehwald, C. Ruyer, H.-P. Schlenvoigt, W. Schumaker, P. Sommer, T. E. Cowan, U. Schramm, S. Glenzer, and F. Fiuza
We report experimental evidence that multi-MeV protons accelerated in relativistic laser-plasma interactions are modulated by strong filamentary electromagnetic fields. Modulations are observed when a preplasma is developed on the rear side of a μm-scale solid-density hydrogen target. Under such con…
[Phys. Rev. Lett. 118, 194801] Published Thu May 11, 2017

Quantum Fluctuations along Symmetry Crossover in a Kondo-Correlated Quantum Dot


Author(s): Meydi Ferrier, Tomonori Arakawa, Tokuro Hata, Ryo Fujiwara, Raphaëlle Delagrange, Richard Deblock, Yoshimichi Teratani, Rui Sakano, Akira Oguri, and Kensuke Kobayashi
Universal properties of entangled many-body states are controlled by their symmetry and quantum fluctuations. By the magnetic-field tuning of the spin-orbital degeneracy in a Kondo-correlated quantum dot, we have modified quantum fluctuations to directly measure their influence on the many-body prop…
[Phys. Rev. Lett. 118, 196803] Published Thu May 11, 2017

Theory of Magnetic Ordering in the Heavy Rare Earths: Ab Initio Electronic Origin of Pair- and Four-Spin Interactions


Author(s): Eduardo Mendive-Tapia and Julie B. Staunton
We describe a disordered local moment theory for long-period magnetic phases and investigate the temperature and magnetic field dependence of the magnetic states in the heavy rare earth elements (HREs), namely, paramagnetic, conical and helical antiferromagnetic (HAFM), fan, and ferromagnetic (FM) s…
[Phys. Rev. Lett. 118, 197202] Published Thu May 11, 2017

Topologically Enforced Bifurcations in Superconducting Circuits


Author(s): G. Engelhardt, M. Benito, G. Platero, and T. Brandes
The relationship of topological insulators and superconductors and the field of nonlinear dynamics is widely unexplored. To address this subject, we adopt the linear coupling geometry of the Su-Schrieffer-Heeger model, a paradigmatic example for a topological insulator, and render it nonlinearly in …
[Phys. Rev. Lett. 118, 197702] Published Thu May 11, 2017

Liquid Droplets Act as “Compass Needles” for the Stresses in a Deformable Membrane


Author(s): Rafael D. Schulman, René Ledesma-Alonso, Thomas Salez, Elie Raphaël, and Kari Dalnoki-Veress

A liquid drop’s shape can be used to detect tension anisotropies in an underlying elastic membrane.

[Phys. Rev. Lett. 118, 198002] Published Thu May 11, 2017

Publisher’s Note: Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu_{2} O_{2} [Phys. Rev. Lett. 118, 176404 (2017)]


Author(s): S. Moser, Y. Nomura, L. Moreschini, G. Gatti, H. Berger, P. Bugnon, A. Magrez, C. Jozwiak, A. Bostwick, E. Rotenberg, S. Biermann, and M. Grioni
[Phys. Rev. Lett. 118, 199902] Published Thu May 11, 2017

Time-Bin-Encoded Boson Sampling with a Single-Photon Device


Author(s): Yu He, X. Ding, Z.-E. Su, H.-L. Huang, J. Qin, C. Wang, S. Unsleber, C. Chen, H. Wang, Y.-M. He, X.-L. Wang, W.-J. Zhang, S.-J. Chen, C. Schneider, M. Kamp, L.-X. You, Z. Wang, S. Höfling, Chao-Yang Lu, and Jian-Wei Pan
Boson sampling is a problem strongly believed to be intractable for classical computers, but can be naturally solved on a specialized photonic quantum simulator. Here, we implement the first time-bin-encoded boson sampling using a highly indistinguishable (∼94%) single-photon source based on a singl…
[Phys. Rev. Lett. 118, 190501] Published Wed May 10, 2017

Numerical Study of Nonperturbative Corrections to the Chiral Separation Effect in Quenched Finite-Density QCD


Author(s): Matthias Puhr and P. V. Buividovich
We demonstrate the nonrenormalization of the chiral separation effect (CSE) in quenched finite-density QCD in both confinement and deconfinement phases using a recently developed numerical method which allows us, for the first time, to address the transport properties of exactly chiral, dense lattic…
[Phys. Rev. Lett. 118, 192003] Published Wed May 10, 2017

Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment


Author(s): Zach Haralson and J. Goree
The Green-Kubo (GK) method is widely used in simulations of strongly coupled plasmas to obtain the viscosity coefficient. However, the method’s applicability, which is often taken for granted, has not been tested experimentally. We report an experimental test using a two-dimensional strongly coupled…
[Phys. Rev. Lett. 118, 195001] Published Wed May 10, 2017

Density-Functional Theory of the Fractional Quantum Hall Effect


Author(s): Jianyun Zhao, Manisha Thakurathi, Manish Jain, Diptiman Sen, and J. K. Jain

An alternative DFT approach on fractional quantum Hall systems uses composite fermions rather than electrons, thus sidestepping the problem of fractional orbital occupation.

[Phys. Rev. Lett. 118, 196802] Published Wed May 10, 2017

Ultrafast Reversal of the Ferroelectric Polarization


Author(s): R. Mankowsky, A. von Hoegen, M. Först, and A. Cavalleri

The ferroelectric polarization in LiNbO3 is transiently reversed with ultrashort optical pulses. The reversal is induced for both directions.

[Phys. Rev. Lett. 118, 197601] Published Wed May 10, 2017

Zero-Phase-Difference Josephson Current Based on Spontaneous Symmetry Breaking via Parametric Excitation of a Movable Superconducting Dot


Author(s): A. M. Eriksson and A. Vikström
Recent advances have attracted attention to nonstandard Josephson junctions in which a supercurrent can flow despite zero phase difference between the constituent superconducting leads. Here, we propose a zero-phase-difference nanoelectromechanical junction which, in contrast to other considered sys…
[Phys. Rev. Lett. 118, 197701] Published Wed May 10, 2017

Possible Dark Matter Annihilation Signal in the AMS-02 Antiproton Data


Author(s): Ming-Yang Cui (崔明阳), Qiang Yuan (袁强), Yue-Lin Sming Tsai, and Yi-Zhong Fan (范一中)

Recently released data on cosmic-ray antiprotons may contain hints of dark matter, as revealed by two new analyses.

[Phys. Rev. Lett. 118, 191101] Published Tue May 09, 2017

Novel Dark Matter Constraints from Antiprotons in Light of AMS-02


Author(s): Alessandro Cuoco, Michael Krämer, and Michael Korsmeier

Recently released data on cosmic-ray antiprotons may contain hints of dark matter, as revealed by two new analyses.

[Phys. Rev. Lett. 118, 191102] Published Tue May 09, 2017

Bloch Waves in Minimal Landau Gauge and the Infinite-Volume Limit of Lattice Gauge Theory


Author(s): Attilio Cucchieri and Tereza Mendes

Bloch’s theorem for electrons in crystalline solids is used in numerical simulations of gauge theories to extrapolate simulations on small number of lattice sites to infinite sites, improving the simulation efficiency.

[Phys. Rev. Lett. 118, 192002] Published Tue May 09, 2017

Hunting the Gluon Orbital Angular Momentum at the Electron-Ion Collider


Author(s): Xiangdong Ji, Feng Yuan, and Yong Zhao
Applying the connection between the parton Wigner distribution and orbital angular momentum (OAM), we investigate the probe of the gluon OAM in hard scattering processes at the planned electron-ion collider. We show that the single longitudinal target-spin asymmetry in the hard diffractive dijet pro…
[Phys. Rev. Lett. 118, 192004] Published Tue May 09, 2017

Strength and Viscosity Effects on Perturbed Shock Front Stability in Metals


Author(s): S. Opie, E. Loomis, P. Peralta, T. Shimada, and R. P. Johnson
Computational modeling and experimental measurements on metal samples subject to a laser-driven, ablative Richtmyer-Meshkov instability showed differences between viscosity and strength effects. In particular, numerical and analytical solutions, coupled with measurements of fed-through perturbations…
[Phys. Rev. Lett. 118, 195501] Published Tue May 09, 2017

Double-Quantum Spin-Relaxation Limits to Coherence of Near-Surface Nitrogen-Vacancy Centers


Author(s): B. A. Myers, A. Ariyaratne, and A. C. Bleszynski Jayich
We probe the relaxation dynamics of the full three-level spin system of near-surface nitrogen-vacancy (NV) centers in diamond to define a T_{1} relaxation time that sets the T_{2}≤2T_{1} coherence limit of the NV’s subset qubit superpositions. We find that double-quantum spin relaxation via electric…
[Phys. Rev. Lett. 118, 197201] Published Tue May 09, 2017

Velocity Fluctuations in Sedimenting Brownian Particles


Author(s): Johannes Möller and Theyencheri Narayanan

During the early stages of sedimentation, synchrotron x-ray studies show that Brownian particles flow similarly to non-Brownian suspensions before Brownian motion takes over.

[Phys. Rev. Lett. 118, 198001] Published Tue May 09, 2017

Erratum: Realization of the Dicke Model Using Cavity-Assisted Raman Transitions [Phys. Rev. Lett. 113, 020408 (2014)]


Author(s): Markus P. Baden, Kyle J. Arnold, Arne L. Grimsmo, Scott Parkins, and Murray D. Barrett
[Phys. Rev. Lett. 118, 199901] Published Tue May 09, 2017

Study of J/ψ Production in Jets


Author(s): R. Aaij et al. (LHCb Collaboration)

A study of J/ψ production in jets reveals the weaknesses of a widely used method of simulating high-energy particle collisions.

[Phys. Rev. Lett. 118, 192001] Published Mon May 08, 2017

Density Propagator for Many-Body Localization: Finite-Size Effects, Transient Subdiffusion, and Exponential Decay


Author(s): Soumya Bera, Giuseppe De Tomasi, Felix Weiner, and Ferdinand Evers
We investigate charge relaxation in quantum wires of spinless disordered fermions (t−V model). Our observable is the time-dependent density propagator Π_{ϵ}(x,t), calculated in windows of different energy density ϵ of the many-body Hamiltonian and at different disorder strengths W, not exceeding the…
[Phys. Rev. Lett. 118, 196801] Published Mon May 08, 2017

Gravity Amplitudes as Generalized Double Copies of Gauge-Theory Amplitudes


Author(s): Zvi Bern, John Joseph Carrasco, Wei-Ming Chen, Henrik Johansson, and Radu Roiban
Whenever the integrand of a gauge-theory loop amplitude can be arranged into a form where the Bern-Carrasco-Johansson duality between color and kinematics is manifest, a corresponding gravity integrand can be obtained simply via the double-copy procedure. However, finding such gauge-theory represent…
[Phys. Rev. Lett. 118, 181602] Published Fri May 05, 2017

Holography of Wi-fi Radiation


Author(s): Philipp M. Holl and Friedemann Reinhard

The Wi-Fi signals that provide internet access can also produce images of the transmitter’s 3D surroundings, even through walls.

[Phys. Rev. Lett. 118, 183901] Published Fri May 05, 2017

Return to the Origin as a Probe of Atomic Phase Coherence


Author(s): Clément Hainaut, Isam Manai, Radu Chicireanu, Jean-François Clément, Samir Zemmouri, Jean Claude Garreau, Pascal Szriftgiser, Gabriel Lemarié, Nicolas Cherroret, and Dominique Delande
We report on the observation of the coherent enhancement of the return probability [“enhanced return to the origin” (ERO)] in a periodically kicked cold-atom gas. By submitting an atomic wave packet to a pulsed, periodically shifted, laser standing wave, we induce an oscillation of ERO in time that …
[Phys. Rev. Lett. 118, 184101] Published Fri May 05, 2017

Observation of Oscillatory Radial Electric Field Relaxation in a Helical Plasma


Author(s): J. A. Alonso, E. Sánchez, I. Calvo, J. L. Velasco, K. J. McCarthy, A. Chmyga, L. G. Eliseev, T. Estrada, R. Kleiber, L. I. Krupnik, A. V. Melnikov, P. Monreal, F. I. Parra, S. Perfilov, and A. I. Zhezhera (the TJ-II Team)
Measurements of the relaxation of a zonal electrostatic potential perturbation in a nonaxisymmetric magnetically confined plasma are presented. A sudden perturbation of the plasma equilibrium is induced by the injection of a cryogenic hydrogen pellet in the TJ-II stellarator, which is observed to be…
[Phys. Rev. Lett. 118, 185002] Published Fri May 05, 2017

Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility


Author(s): J. S. Ross et al.

A transition from a Coulomb-collision-dominated regime to a collisionless-collective-scattering regime is observed at the NIF in plasmas with high Mach numbers.

[Phys. Rev. Lett. 118, 185003] Published Fri May 05, 2017

Scheme to Measure the Topological Number of a Chern Insulator from Quench Dynamics


Author(s): Ce Wang, Pengfei Zhang, Xin Chen, Jinlong Yu, and Hui Zhai
We show how the topological number of a static Hamiltonian can be measured from a dynamical quench process. We focus on a two-band Chern insulator in two dimension, for instance, the Haldane model, whose dynamical process can be described by a mapping from the [k_{x},k_{y},t] space to the Bloch sphe…
[Phys. Rev. Lett. 118, 185701] Published Fri May 05, 2017

Anomalous Thermal Conductivity and Magnetic Torque Response in the Honeycomb Magnet α−RuCl_{3}


Author(s): Ian A. Leahy, Christopher A. Pocs, Peter E. Siegfried, David Graf, S.-H. Do, Kwang-Yong Choi, B. Normand, and Minhyea Lee
We report on the unusual behavior of the in-plane thermal conductivity κ and torque τ response in the Kitaev-Heisenberg material α−RuCl_{3}. κ shows a striking enhancement with linear growth beyond H=7  T, where magnetic order disappears, while τ for both of the in-plane symmetry directions shows an…
[Phys. Rev. Lett. 118, 187203] Published Fri May 05, 2017

Matter-Wave Tractor Beams


Author(s): Alexey A. Gorlach, Maxim A. Gorlach, Andrei V. Lavrinenko, and Andrey Novitsky

Theory shows that the quantum-mechanical wave of a beam of particles can exert a pulling force on a small particle, just as other waves do.

[Phys. Rev. Lett. 118, 180401] Published Thu May 04, 2017

Experimental Demonstration of Uncertainty Relations for the Triple Components of Angular Momentum


Author(s): Wenchao Ma, Bin Chen, Ying Liu, Mengqi Wang, Xiangyu Ye, Fei Kong, Fazhan Shi, Shao-Ming Fei, and Jiangfeng Du
The uncertainty principle is considered to be one of the most striking features in quantum mechanics. In the textbook literature, uncertainty relations usually refer to the preparation uncertainty which imposes a limitation on the spread of measurement outcomes for a pair of noncommuting observables…
[Phys. Rev. Lett. 118, 180402] Published Thu May 04, 2017

Experimental Determination of Dynamical Lee-Yang Zeros


Author(s): Kay Brandner, Ville F. Maisi, Jukka P. Pekola, Juan P. Garrahan, and Christian Flindt

Lee-Yang zeros–complex singularities of the free energy in systems of finite size–are experimentally determined for the first time.

[Phys. Rev. Lett. 118, 180601] Published Thu May 04, 2017

Detecting Gravitational Wave Memory without Parent Signals


Author(s): Lucy O. McNeill, Eric Thrane, and Paul D. Lasky
Gravitational-wave memory manifests as a permanent distortion of an idealized gravitational-wave detector and arises generically from energetic astrophysical events. For example, binary black hole mergers are expected to emit memory bursts a little more than an order of magnitude smaller in strain t…
[Phys. Rev. Lett. 118, 181103] Published Thu May 04, 2017

Stimulated Emission of Fast Alfvén Waves within Magnetically Confined Fusion Plasmas


Author(s): J. W. S. Cook, R. O. Dendy, and S. C. Chapman
A fast Alfvén wave with a finite amplitude is shown to grow by a stimulated emission process that we propose for exploitation in toroidal magnetically confined fusion plasmas. Stimulated emission occurs while the wave propagates inward through the outer midplane plasma, where a population inversion …
[Phys. Rev. Lett. 118, 185001] Published Thu May 04, 2017

Filling-Enforced Magnetic Dirac Semimetals in Two Dimensions


Author(s): Steve M. Young and Benjamin J. Wieder
Filling-enforced Dirac semimetals, or those required at specific fillings by the combination of crystalline and time-reversal symmetries, have been proposed in numerous materials. However, Dirac points in these materials are not generally robust against breaking or modifying time-reversal symmetry. …
[Phys. Rev. Lett. 118, 186401] Published Thu May 04, 2017