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# Recent Articles in Phys. Rev. Lett.

## Recent articles in Physical Review Letters

Published: 2016-10-21T10:00:21-04:00

Measuring Incompatible Observables by Exploiting Sequential Weak Values

2016-10-20T10:00:00-04:00

Author(s): F. Piacentini, A. Avella, M. P. Levi, M. Gramegna, G. Brida, I. P. Degiovanni, E. Cohen, R. Lussana, F. Villa, A. Tosi, F. Zappa, and M. Genovese
One of the most intriguing aspects of quantum mechanics is the impossibility of measuring at the same time observables corresponding to noncommuting operators, because of quantum uncertainty. This impossibility can be partially relaxed when considering joint or sequential weak value evaluation. Inde…
[Phys. Rev. Lett. 117, 170402] Published Thu Oct 20, 2016

Experimental Test of Compatibility-Loophole-Free Contextuality with Spatially Separated Entangled Qutrits

2016-10-20T10:00:00-04:00

Author(s): Xiao-Min Hu, Jiang-Shan Chen, Bi-Heng Liu, Yu Guo, Yun-Feng Huang, Zong-Quan Zhou, Yong-Jian Han, Chuan-Feng Li, and Guang-Can Guo
The physical impact and the testability of the Kochen-Specker (KS) theorem is debated because of the fact that perfect compatibility in a single quantum system cannot be achieved in practical experiments with finite precision. Here, we follow the proposal of A. Cabello and M. T. Cunha [Phys. Rev. Le…
[Phys. Rev. Lett. 117, 170403] Published Thu Oct 20, 2016

Transient Weakening of Earth’s Magnetic Shield Probed by a Cosmic Ray Burst

2016-10-20T10:00:00-04:00

Author(s): P. K. Mohanty, K. P. Arunbabu, T. Aziz, S. R. Dugad, S. K. Gupta, B. Hariharan, P. Jagadeesan, A. Jain, S. D. Morris, B. S. Rao, Y. Hayashi, S. Kawakami, A. Oshima, S. Shibata, S. Raha, P. Subramanian, and H. Kojima

Observations with India’s cosmic-ray telescope indicate that Earth’s magnetic field weakened during a 2015 geomagnetic storm, allowing cosmic rays to pass through.

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[Phys. Rev. Lett. 117, 171101] Published Thu Oct 20, 2016

New Target for Cosmic Axion Searches

2016-10-20T10:00:00-04:00

Author(s): Daniel Baumann, Daniel Green, and Benjamin Wallisch
Future cosmic microwave background experiments have the potential to probe the density of relativistic species at the subpercent level. This sensitivity allows light thermal relics to be detected up to arbitrarily high decoupling temperatures. Conversely, the absence of a detection would require ext…
[Phys. Rev. Lett. 117, 171301] Published Thu Oct 20, 2016

Four-Gluon Scattering at Three Loops, Infrared Structure, and the Regge Limit

2016-10-20T10:00:00-04:00

Author(s): J. M. Henn and B. Mistlberger
We compute the three-loop four-gluon scattering amplitude in maximally supersymmetric Yang-Mills theory, including its full color dependence. Our result is the first complete computation of a nonplanar four-particle scattering amplitude to three loops in four-dimensional gauge theory and consequentl…
[Phys. Rev. Lett. 117, 171601] Published Thu Oct 20, 2016

Three-Loop Corrections to the Soft Anomalous Dimension in Multileg Scattering

2016-10-20T10:00:00-04:00

Author(s): Øyvind Almelid, Claude Duhr, and Einan Gardi
We present the three-loop result for the soft anomalous dimension governing long-distance singularities of multileg gauge-theory scattering amplitudes of massless partons. We compute all contributing webs involving semi-infinite Wilson lines at three loops and obtain the complete three-loop correcti…
[Phys. Rev. Lett. 117, 172002] Published Thu Oct 20, 2016

Quantized Chiral Magnetic Current from Reconnections of Magnetic Flux

2016-10-20T10:00:00-04:00

Author(s): Yuji Hirono, Dmitri E. Kharzeev, and Yi Yin
We introduce a new mechanism for the chiral magnetic effect that does not require an initial chirality imbalance. The chiral magnetic current is generated by reconnections of magnetic flux that change the magnetic helicity of the system. The resulting current is entirely determined by the change of …
[Phys. Rev. Lett. 117, 172301] Published Thu Oct 20, 2016

High-Precision Ramsey-Comb Spectroscopy at Deep Ultraviolet Wavelengths

2016-10-20T10:00:00-04:00

Author(s): R. K. Altmann, S. Galtier, L. S. Dreissen, and K. S. E. Eikema
High-precision spectroscopy in systems such as molecular hydrogen and helium ions is very interesting in view of tests of quantum electrodynamics and the proton radius puzzle. However, the required deep ultraviolet and shorter wavelengths pose serious experimental challenges. Here we show Ramsey-com…
[Phys. Rev. Lett. 117, 173201] Published Thu Oct 20, 2016

Superradiant Phase Transition in a Superconducting Circuit in Thermal Equilibrium

2016-10-20T10:00:00-04:00

Author(s): Motoaki Bamba, Kunihiro Inomata, and Yasunobu Nakamura
We propose a superconducting circuit that shows a superradiant phase transition (SRPT) in thermal equilibrium. The existence of the SRPT is confirmed analytically in the limit of an infinite number of artificial atoms. We also perform a numerical diagonalization of the Hamiltonian with a finite numb…
[Phys. Rev. Lett. 117, 173601] Published Thu Oct 20, 2016

Nonlinear Response of Inertial Tracers in Steady Laminar Flows: Differential and Absolute Negative Mobility

2016-10-20T10:00:00-04:00

Author(s): A. Sarracino, F. Cecconi, A. Puglisi, and A. Vulpiani
We study the mobility and the diffusion coefficient of an inertial tracer advected by a two-dimensional incompressible laminar flow, in the presence of thermal noise and under the action of an external force. We show, with extensive numerical simulations, that the force-velocity relation for the tra…
[Phys. Rev. Lett. 117, 174501] Published Thu Oct 20, 2016

Frequency-Comb Spectrum of Periodic-Patterned Signals

2016-10-20T10:00:00-04:00

Author(s): Johannes L. Steinmann, Edmund Blomley, Miriam Brosi, Erik Bründermann, Michele Caselle, Jeffrey L. Hesler, Nicole Hiller, Benjamin Kehrer, Yves-Laurent Mathis, Michael J. Nasse, Juliane Raasch, Manuel Schedler, Patrik Schönfeldt, Marcel Schuh, Markus Schwarz, Michael Siegel, Nigel Smale, Marc Weber, and Anke-Susanne Müller
Using arbitrary periodic pulse patterns we show the enhancement of specific frequencies in a frequency comb. The envelope of a regular frequency comb originates from equally spaced, identical pulses and mimics the single pulse spectrum. We investigated spectra originating from the periodic emission …
[Phys. Rev. Lett. 117, 174802] Published Thu Oct 20, 2016

Longitudinal Spin Relaxation of Optically Pumped Rubidium Atoms in Solid Parahydrogen

2016-10-20T10:00:00-04:00

Author(s): Sunil Upadhyay, Andrew N. Kanagin, Chase Hartzell, Tim Christy, W. Patrick Arnott, Takamasa Momose, David Patterson, and Jonathan D. Weinstein
We have grown crystals of solid parahydrogen using a single closed-cycle cryostat. We have doped the crystals with rubidium atoms at densities on the order of 10^{17}  cm^{−3} and used optical pumping to polarize the spin state of the implanted atoms. The optical spectrum of the rubidium atoms shows…
[Phys. Rev. Lett. 117, 175301] Published Thu Oct 20, 2016

Superradiance Induced Particle Flow via Dynamical Gauge Coupling

2016-10-20T10:00:00-04:00

Author(s): W. Zheng and N. R. Cooper
We study fermions that are gauge coupled to a cavity mode via Raman-assisted hopping in a one-dimensional lattice. For an infinite lattice, we find a superradiant phase with an infinitesimal pumping threshold which induces a directed particle flow. We explore the fate of this flow in a finite lattic…
[Phys. Rev. Lett. 117, 175302] Published Thu Oct 20, 2016

Quantitative STEM Imaging of Order-Disorder Phenomena in Double Perovskite Thin Films

2016-10-20T10:00:00-04:00

Author(s): B. D. Esser, A. J. Hauser, R. E. A. Williams, L. J. Allen, P. M. Woodward, F. Y. Yang, and D. W. McComb
Using aberration-corrected high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), we investigate ordering phenomena in epitaxial thin films of the double perovskite Sr_{2}CrReO_{6}. Experimental and simulated imaging and diffraction are used to identify antiphase domai…
[Phys. Rev. Lett. 117, 176101] Published Thu Oct 20, 2016

Field-Driven Mott Gap Collapse and Resistive Switch in Correlated Insulators

2016-10-20T10:00:00-04:00

Author(s): G. Mazza, A. Amaricci, M. Capone, and M. Fabrizio
Mott insulators are “unsuccessful metals” in which Coulomb repulsion prevents charge conduction despite a metal-like concentration of conduction electrons. The possibility to unlock the frozen carriers with an electric field offers tantalizing prospects of realizing new Mott-based microelectronic de…
[Phys. Rev. Lett. 117, 176401] Published Thu Oct 20, 2016

Spin Hall Effect and Origins of Nonlocal Resistance in Adatom-Decorated Graphene

2016-10-20T10:00:00-04:00

Author(s): D. Van Tuan, J. M. Marmolejo-Tejada, X. Waintal, B. K. Nikolić, S. O. Valenzuela, and S. Roche
Recent experiments reporting an unexpectedly large spin Hall effect (SHE) in graphene decorated with adatoms have raised a fierce controversy. We apply numerically exact Kubo and Landauer-Büttiker formulas to realistic models of gold-decorated disordered graphene (including adatom clustering) to obt…
[Phys. Rev. Lett. 117, 176602] Published Thu Oct 20, 2016

Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling

2016-10-20T10:00:00-04:00

Author(s): Q. Cui, J.-G. Cheng, W. Fan, A. E. Taylor, S. Calder, M. A. McGuire, J.-Q. Yan, D. Meyers, X. Li, Y. Q. Cai, Y. Y. Jiao, Y. Choi, D. Haskel, H. Gotou, Y. Uwatoko, J. Chakhalian, A. D. Christianson, S. Yunoki, J. B. Goodenough, and J.-S. Zhou
The perovskite SrIrO_{3} is an exotic narrow-band metal owing to a confluence of the strengths of the spin-orbit coupling (SOC) and the electron-electron correlations. It has been proposed that topological and magnetic insulating phases can be achieved by tuning the SOC, Hubbard interactions, and/or…
[Phys. Rev. Lett. 117, 176603] Published Thu Oct 20, 2016

Unusual Dirac Fermions on the Surface of a Noncentrosymmetric α-BiPd Superconductor

2016-10-20T10:00:00-04:00

Author(s): S. Thirupathaiah, Soumi Ghosh, Rajveer Jha, E. D. L. Rienks, Kapildeb Dolui, V. V. Ravi Kishore, B. Büchner, Tanmoy Das, V. P. S. Awana, D. D. Sarma, and J. Fink
Combining multiple emergent correlated properties such as superconductivity and magnetism within the topological matrix can have exceptional consequences in garnering new and exotic physics. Here, we study the topological surface states from a noncentrosymmetric α-BiPd superconductor by employing an…
[Phys. Rev. Lett. 117, 177001] Published Thu Oct 20, 2016

Tunable Magnetic Anisotropy from Higher-Harmonics Exchange Scattering on the Surface of a Topological Insulator

2016-10-20T10:00:00-04:00

Author(s): Jens Paaske and Erikas Gaidamauskas
We show that higher-harmonics exchange scattering from a magnetic adatom on the surface of a three dimensional topological insulator leads to a magnetic anisotropy whose magnitude and sign may be tuned by adjusting the chemical potential of the helical surface band. As the chemical potential moves f…
[Phys. Rev. Lett. 117, 177201] Published Thu Oct 20, 2016

Multicellular Self-Organization of P. aeruginosa due to Interactions with Secreted Trails

2016-10-20T10:00:00-04:00

Author(s): Anatolij Gelimson, Kun Zhao, Calvin K. Lee, W. Till Kranz, Gerard C. L. Wong, and Ramin Golestanian
Guided movement in response to slowly diffusing polymeric trails provides a unique mechanism for self-organization of some microorganisms. To elucidate how this signaling route leads to microcolony formation, we experimentally probe the trajectory and orientation of Pseudomonas aeruginosa that prope…
[Phys. Rev. Lett. 117, 178102] Published Thu Oct 20, 2016

Pruning to Increase Taylor Dispersion in Physarum polycephalum Networks

2016-10-20T10:00:00-04:00

Author(s): Sophie Marbach, Karen Alim, Natalie Andrew, Anne Pringle, and Michael P. Brenner
How do the topology and geometry of a tubular network affect the spread of particles within fluid flows? We investigate patterns of effective dispersion in the hierarchical, biological transport network formed by Physarum polycephalum. We demonstrate that a change in topology—pruning in the foraging…
[Phys. Rev. Lett. 117, 178103] Published Thu Oct 20, 2016

Erratum: Structure and Dynamics of Loosely Cross-Linked Ionic Microgel Dispersions in the Fluid Regime [Phys. Rev. Lett. 109, 048302 (2012)]

2016-10-20T10:00:00-04:00

Author(s): P. Holmqvist, P. S. Mohanty, G. Nägele, P. Schurtenberger, and M. Heinen
[Phys. Rev. Lett. 117, 179901] Published Thu Oct 20, 2016

Time-Resolved Observation of Thermalization in an Isolated Quantum System

2016-10-19T10:00:00-04:00

Author(s): Govinda Clos, Diego Porras, Ulrich Warring, and Tobias Schaetz
We use trapped atomic ions forming a hybrid Coulomb crystal and exploit its phonons to study an isolated quantum system composed of a single spin coupled to an engineered bosonic environment. We increase the complexity of the system by adding ions and controlling coherent couplings and, thereby, we …
[Phys. Rev. Lett. 117, 170401] Published Wed Oct 19, 2016

Experimental Time-Optimal Universal Control of Spin Qubits in Solids

2016-10-19T10:00:00-04:00

Author(s): Jianpei Geng, Yang Wu, Xiaoting Wang, Kebiao Xu, Fazhan Shi, Yijin Xie, Xing Rong, and Jiangfeng Du

New experiments find the fastest way to manipulate logic gates with two qubits as inputs.

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[Phys. Rev. Lett. 117, 170501] Published Wed Oct 19, 2016

Two-Jet Rate in e^{+} e^{−} at Next-to-Next-to-Leading-Logarithmic Order

2016-10-19T10:00:00-04:00

Author(s): Andrea Banfi, Heather McAslan, Pier Francesco Monni, and Giulia Zanderighi
We present the first next-to-next-to-leading-logarithmic resummation for the two-jet rate in e^{+}e^{−} annihilation in the Durham and Cambridge algorithms. The results are obtained by extending the ares method to observables involving any global, recursively infrared and collinear safe jet algorith…
[Phys. Rev. Lett. 117, 172001] Published Wed Oct 19, 2016

High Efficiency Energy Extraction from a Relativistic Electron Beam in a Strongly Tapered Undulator

2016-10-19T10:00:00-04:00

Author(s): N. Sudar, P. Musumeci, J. Duris, I. Gadjev, M. Polyanskiy, I. Pogorelsky, M. Fedurin, C. Swinson, K. Kusche, M. Babzien, and A. Gover

An unprecedented amount of energy extracted from a relativistic electron beam is converted into coherent radiation, a result that could enable high-average-power light sources to be created.

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[Phys. Rev. Lett. 117, 174801] Published Wed Oct 19, 2016

Direct Observation of a Long-Range Field Effect from Gate Tuning of Nonlocal Conductivity

2016-10-19T10:00:00-04:00

Author(s): Lin Wang, Ignacio Gutiérrez-Lezama, Céline Barreteau, Dong-Keun Ki, Enrico Giannini, and Alberto F. Morpurgo

An unconventional long-range field effect in WTe${}_{2}$ is used to gate-tune the bulk properties of the material. This method could be used to gate-tune electronic properties deep in the interior of conducting materials, avoiding limitations imposed by electrostatic screening.

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[Phys. Rev. Lett. 117, 176601] Published Wed Oct 19, 2016

Structure of ^{78} Ni from First-Principles Computations

2016-10-17T10:00:00-04:00

Author(s): G. Hagen, G. R. Jansen, and T. Papenbrock
Doubly magic nuclei have a simple structure and are the cornerstones for entire regions of the nuclear chart. Theoretical insights into the supposedly doubly magic ^{78}Ni and its neighbors are challenging because of the extreme neutron-to-proton ratio and the proximity of the continuum. We predict …
[Phys. Rev. Lett. 117, 172501] Published Mon Oct 17, 2016

Quantum Phase Transition in the Shape of Zr isotopes

2016-10-17T10:00:00-04:00

Author(s): Tomoaki Togashi, Yusuke Tsunoda, Takaharu Otsuka, and Noritaka Shimizu

High-resolution inelastic electron scattering on ${}^{96}$Zr establishes shape coexistence—where two nearby states possess distinct shapes—for this nucleus. Monte Carlo shell-model calculations indicate that the shape change in Zr isotopes is a quantum phase transition.

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[Phys. Rev. Lett. 117, 172502] Published Mon Oct 17, 2016

First Measurement of Collectivity of Coexisting Shapes Based on Type II Shell Evolution: The Case of ^{96} Zr

2016-10-17T10:00:00-04:00

Author(s): C. Kremer, S. Aslanidou, S. Bassauer, M. Hilcker, A. Krugmann, P. von Neumann-Cosel, T. Otsuka, N. Pietralla, V. Yu. Ponomarev, N. Shimizu, M. Singer, G. Steinhilber, T. Togashi, Y. Tsunoda, V. Werner, and M. Zweidinger

High-resolution inelastic electron scattering on ${}^{96}$Zr establishes shape coexistence—where two nearby states possess distinct shapes—for this nucleus. Monte Carlo shell-model calculations indicate that the shape change in Zr isotopes is a quantum phase transition.

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[Phys. Rev. Lett. 117, 172503] Published Mon Oct 17, 2016

Microwave-Induced Oscillations in Magnetocapacitance: Direct Evidence for Nonequilibrium Occupation of Electronic States

2016-10-17T10:00:00-04:00

Author(s): S. I. Dorozhkin, A. A. Kapustin, V. Umansky, K. von Klitzing, and J. H. Smet

Experiments show that microwave-induced magneto-oscillations in the capacitance of two-dimensional electron gases differ from the corresponding oscillations in resistance. The oscillations reflect a nonequilibrium energy distribution of electrons and support a quantum origin of the effect.

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[Phys. Rev. Lett. 117, 176801] Published Mon Oct 17, 2016

Sequence-Specific Polyampholyte Phase Separation in Membraneless Organelles

2016-10-17T10:00:00-04:00

Author(s): Yi-Hsuan Lin, Julie D. Forman-Kay, and Hue Sun Chan
Liquid-liquid phase separation of charge- and/or aromatic-enriched intrinsically disordered proteins (IDPs) is critical in the biological function of membraneless organelles. Much of the physics of this recent discovery remains to be elucidated. Here, we present a theory in the random phase approxim…
[Phys. Rev. Lett. 117, 178101] Published Mon Oct 17, 2016

Observation of Time-Invariant Coherence in a Nuclear Magnetic Resonance Quantum Simulator

2016-10-14T10:00:00-04:00

Author(s): Isabela A. Silva, Alexandre M. Souza, Thomas R. Bromley, Marco Cianciaruso, Raimund Marx, Roberto S. Sarthour, Ivan S. Oliveira, Rosario Lo Franco, Steffen J. Glaser, Eduardo R. deAzevedo, Diogo O. Soares-Pinto, and Gerardo Adesso
The ability to live in coherent superpositions is a signature trait of quantum systems and constitutes an irreplaceable resource for quantum-enhanced technologies. However, decoherence effects usually destroy quantum superpositions. It was recently predicted that, in a composite quantum system expos…
[Phys. Rev. Lett. 117, 160402] Published Fri Oct 14, 2016

Mass Ordering of Spectra from Fragmentation of Saturated Gluon States in High-Multiplicity Proton-Proton Collisions

2016-10-14T10:00:00-04:00

Author(s): Björn Schenke, Sören Schlichting, Prithwish Tribedy, and Raju Venugopalan
The mass ordering of mean transverse momentum ⟨p_{T}⟩ and of the Fourier harmonic coefficient v_{2}(p_{T}) of azimuthally anisotropic particle distributions in high energy hadron collisions is often interpreted as evidence for the hydrodynamic flow of the matter produced. We investigate an alternati…
[Phys. Rev. Lett. 117, 162301] Published Fri Oct 14, 2016

Two-Proton Radioactivity of ^{67} Kr

2016-10-14T10:00:00-04:00

Author(s): T. Goigoux et al.

The measured half-life for two-proton emission from ${}^{6}7$Kr—the heaviest such emitter observed to date—is much shorter than theoretical predictions.

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[Phys. Rev. Lett. 117, 162501] Published Fri Oct 14, 2016

Sensitivity of (d, p) Reactions to High n−p Momenta and the Consequences for Nuclear Spectroscopy Studies

2016-10-14T10:00:00-04:00

Author(s): G. W. Bailey, N. K. Timofeyuk, and J. A. Tostevin
Theoretical models of low-energy (d, p) single-neutron transfer reactions are a crucial link between experimentation, nuclear structure, and nuclear astrophysical studies. Whereas reaction models that use local optical potentials are insensitive to short-range physics in the deuteron, we show that i…
[Phys. Rev. Lett. 117, 162502] Published Fri Oct 14, 2016

Competition between Spin Echo and Spin Self-Rephasing in a Trapped Atom Interferometer

2016-10-14T10:00:00-04:00

Author(s): C. Solaro, A. Bonnin, F. Combes, M. Lopez, X. Alauze, J.-N. Fuchs, F. Piéchon, and F. Pereira Dos Santos
We perform Ramsey interferometry on an ultracold ^{87}Rb ensemble confined in an optical dipole trap. We use a π pulse set at the middle of the interferometer to restore the coherence of the spin ensemble by canceling out phase inhomogeneities and creating a spin echo in the contrast. However, for h…
[Phys. Rev. Lett. 117, 163003] Published Fri Oct 14, 2016

Nonperturbative Twist in the Generation of Extreme-Ultraviolet Vortex Beams

2016-10-14T10:00:00-04:00

Author(s): Laura Rego, Julio San Román, Antonio Picón, Luis Plaja, and Carlos Hernández-García
High-order harmonic generation (HHG) has been recently proven to produce extreme-ultraviolet (XUV) vortices from the nonlinear conversion of infrared twisted beams. Previous works have demonstrated a linear scaling law of the vortex charge with the harmonic order. We demonstrate that this simple law…
[Phys. Rev. Lett. 117, 163202] Published Fri Oct 14, 2016

Dispersion of Droplet Clouds in Turbulence

2016-10-14T10:00:00-04:00

Author(s): Humberto Bocanegra Evans, Nico Dam, Guus Bertens, Dennis van der Voort, and Willem van de Water
We measure the absolute dispersion of clouds of monodisperse, phosphorescent droplets in turbulent air by means of high-speed image-intensified video recordings. Laser excitation allows the initial preparation of well-defined, pencil-shaped luminous droplet clouds in a completely nonintrusive way. W…
[Phys. Rev. Lett. 117, 164501] Published Fri Oct 14, 2016

Optimal Stretching in Advection-Reaction-Diffusion Systems

2016-10-14T10:00:00-04:00

Author(s): Thomas D. Nevins and Douglas H. Kelley
We investigate growth of the excitable Belousov-Zhabotinsky reaction in chaotic, time-varying flows. In slow flows, reacted regions tend to lie near vortex edges, whereas fast flows restrict reacted regions to vortex cores. We show that reacted regions travel toward vortex centers faster as flow spe…
[Phys. Rev. Lett. 117, 164502] Published Fri Oct 14, 2016

Tunneling Planar Hall Effect in Topological Insulators: Spin Valves and Amplifiers

2016-10-14T10:00:00-04:00

Author(s): Benedikt Scharf, Alex Matos-Abiague, Jong E. Han, Ewelina M. Hankiewicz, and Igor Žutić
We investigate tunneling across a single ferromagnetic barrier on the surface of a three-dimensional topological insulator. In the presence of a magnetization component along the bias direction, a tunneling planar Hall conductance (TPHC), transverse to the applied bias, develops. Electrostatic contr…
[Phys. Rev. Lett. 117, 166806] Published Fri Oct 14, 2016

Josephson Currents Induced by the Witten Effect

2016-10-14T10:00:00-04:00

Author(s): Flavio S. Nogueira, Zohar Nussinov, and Jeroen van den Brink

Type-II superconductors with a topological insulator junction are predicted to generate an AC Josephson effect in the absence of an external voltage.

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[Phys. Rev. Lett. 117, 167002] Published Fri Oct 14, 2016

Field-Tuned Order by Disorder in Frustrated Ising Magnets with Antiferromagnetic Interactions

2016-10-14T10:00:00-04:00

Author(s): P. C. Guruciaga, M. Tarzia, M. V. Ferreyra, L. F. Cugliandolo, S. A. Grigera, and R. A. Borzi
We demonstrate the appearance of thermal order by disorder in Ising pyrochlores with staggered antiferromagnetic order frustrated by an applied magnetic field. We use a mean-field cluster variational method, a low-temperature expansion, and Monte Carlo simulations to characterize the order-by-disord…
[Phys. Rev. Lett. 117, 167203] Published Fri Oct 14, 2016

Tuning Spin Hall Angles by Alloying

2016-10-14T10:00:00-04:00

Author(s): M. Obstbaum, M. Decker, A. K. Greitner, M. Haertinger, T. N. G. Meier, M. Kronseder, K. Chadova, S. Wimmer, D. Ködderitzsch, H. Ebert, and C. H. Back
Within a combined experimental and theoretical study it is shown that the spin Hall angle of a substitutional alloy system can be continuously varied via its composition. For the alloy system Au_{x}Pt_{1−x} a substantial increase of the maximum spin Hall angle compared to the pure alloy partners cou…
[Phys. Rev. Lett. 117, 167204] Published Fri Oct 14, 2016

Scaling Laws in Spatial Network Formation

2016-10-14T10:00:00-04:00

Author(s): Nora Molkenthin and Marc Timme
Geometric constraints impact the formation of a broad range of spatial networks, from amino acid chains folding to proteins structures to rearranging particle aggregates. How the network of interactions dynamically self-organizes in such systems is far from fully understood. Here, we analyze a class…
[Phys. Rev. Lett. 117, 168301] Published Fri Oct 14, 2016

Comment on “Unraveling Photoinduced Spin Dynamics in the Topological Insulator Bi_{2} Se_{3} ”

2016-10-14T10:00:00-04:00

Author(s): Y. D. Glinka
[Phys. Rev. Lett. 117, 169701] Published Fri Oct 14, 2016

Wang et al. Reply:

2016-10-14T10:00:00-04:00

Author(s): M. C. Wang, S. Qiao, Z. Jiang, S. N. Luo, and J. Qi
[Phys. Rev. Lett. 117, 169702] Published Fri Oct 14, 2016

Universal Three-Body Physics in Ultracold KRb Mixtures

2016-10-12T10:00:00-04:00

Author(s): L. J. Wacker, N. B. Jørgensen, D. Birkmose, N. Winter, M. Mikkelsen, J. Sherson, N. Zinner, and J. J. Arlt
Ultracold atomic gases have recently become a driving force in few-body physics due to the observation of the Efimov effect. While initially observed in equal mass systems, one expects even richer few-body physics in the heteronuclear case. In previous experiments with ultracold mixtures of potassiu…
[Phys. Rev. Lett. 117, 163201] Published Wed Oct 12, 2016

Observation of Fermi-Pasta-Ulam Recurrence Induced by Breather Solitons in an Optical Microresonator

2016-10-12T10:00:00-04:00

Author(s): Chengying Bao, Jose A. Jaramillo-Villegas, Yi Xuan, Daniel E. Leaird, Minghao Qi, and Andrew M. Weiner
We present, experimentally and numerically, the observation of Fermi-Pasta-Ulam recurrence induced by breather solitons in a high-Q SiN microresonator. Breather solitons can be excited by increasing the pump power at a relatively small pump phase detuning in microresonators. Out of phase power evolu…
[Phys. Rev. Lett. 117, 163901] Published Wed Oct 12, 2016

Rippled Quasiperpendicular Shock Observed by the Magnetospheric Multiscale Spacecraft

2016-10-12T10:00:00-04:00

Author(s): A. Johlander, S. J. Schwartz, A. Vaivads, Yu. V. Khotyaintsev, I. Gingell, I. B. Peng, S. Markidis, P.-A. Lindqvist, R. E. Ergun, G. T. Marklund, F. Plaschke, W. Magnes, R. J. Strangeway, C. T. Russell, H. Wei, R. B. Torbert, W. R. Paterson, D. J. Gershman, J. C. Dorelli, L. A. Avanov, B. Lavraud, Y. Saito, B. L. Giles, C. J. Pollock, and J. L. Burch

Satellites orbiting near the edge of Earth’s magnetosphere have measured the velocities of ions accelerated by a shockwave with unprecedented temporal resolution.

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[Phys. Rev. Lett. 117, 165101] Published Wed Oct 12, 2016

Strong Spin-Orbit Interaction of Light in Plasmonic Nanostructures and Nanocircuits

2016-10-12T10:00:00-04:00

Author(s): Deng Pan, Hong Wei, Long Gao, and Hongxing Xu
The coupling between the spin and orbital degrees of freedom of photons is usually very weak, but recent studies have shown that this spin-orbit interaction (SOI) can be easily detected in metal structures. Here we show how the SOI of light is enhanced in plasmonic metal nanostructures, explore the …
[Phys. Rev. Lett. 117, 166803] Published Wed Oct 12, 2016

Defect Dynamics in Artificial Colloidal Ice: Real-Time Observation, Manipulation, and Logic Gate

2016-10-12T10:00:00-04:00

Author(s): Johannes Loehr, Antonio Ortiz-Ambriz, and Pietro Tierno
We study the defect dynamics in a colloidal spin ice system realized by filling a square lattice of topographic double well islands with repulsively interacting magnetic colloids. We focus on the contraction of defects in the ground state, and contraction or expansion in a metastable biased state. C…
[Phys. Rev. Lett. 117, 168001] Published Wed Oct 12, 2016

Sequential Feedback Scheme Outperforms the Parallel Scheme for Hamiltonian Parameter Estimation

2016-10-11T10:00:00-04:00

Author(s): Haidong Yuan
Measurement and estimation of parameters are essential for science and engineering, where the main quest is to find the highest achievable precision with the given resources and design schemes to attain it. Two schemes, the sequential feedback scheme and the parallel scheme, are usually studied in t…
[Phys. Rev. Lett. 117, 160801] Published Tue Oct 11, 2016

Suppression of Clock Shifts at Magnetic-Field-Insensitive Transitions

2016-10-11T10:00:00-04:00

Author(s): K. J. Arnold and M. D. Barrett
We show that it is possible to significantly reduce rank 2 tensor shifts of a clock transition by operating at a judiciously chosen magnetic-field-insensitive point. In some cases shifts are almost completely eliminated making the transition an effective J=0 to J=0 candidate. This significantly impr…
[Phys. Rev. Lett. 117, 160802] Published Tue Oct 11, 2016

Topological Varma Superfluid in Optical Lattices

2016-10-11T10:00:00-04:00

Author(s): M. Di Liberto, A. Hemmerich, and C. Morais Smith
Topological states of matter are peculiar quantum phases showing different edge and bulk transport properties connected by the bulk-boundary correspondence. While noninteracting fermionic topological insulators are well established by now and have been classified according to a tenfold scheme, the p…
[Phys. Rev. Lett. 117, 163001] Published Tue Oct 11, 2016

Hydrogen Bonds in Excited State Proton Transfer

2016-10-11T10:00:00-04:00

Author(s): D. A. Horke, H. M. Watts, A. D. Smith, E. Jager, E. Springate, O. Alexander, C. Cacho, R. T. Chapman, and R. S. Minns

Hydrogen bonding may safeguard biomolecules against the damaging effects of UV light.

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[Phys. Rev. Lett. 117, 163002] Published Tue Oct 11, 2016

Cooling Mechanical Oscillators by Coherent Control

2016-10-11T10:00:00-04:00

Author(s): Martin Frimmer, Jan Gieseler, and Lukas Novotny

Two oscillation modes of a levitated nanoparticle are cooled to their ground state through coupling of the modes.

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[Phys. Rev. Lett. 117, 163601] Published Tue Oct 11, 2016

Surface Rebound of Relativistic Dislocations Directly and Efficiently Initiates Deformation Twinning

2016-10-11T10:00:00-04:00

Author(s): Qing-Jie Li, Ju Li, Zhi-Wei Shan, and Evan Ma
Under ultrahigh stresses (e.g., under high strain rates or in small-volume metals) deformation twinning (DT) initiates on a very short time scale, indicating strong spatial-temporal correlations in dislocation dynamics. Using atomistic simulations, here we demonstrate that surface rebound of relativ…
[Phys. Rev. Lett. 117, 165501] Published Tue Oct 11, 2016

Cluster Glass Transition of Ultrasoft-Potential Fluids at High Density

2016-10-11T10:00:00-04:00

Author(s): Ryoji Miyazaki, Takeshi Kawasaki, and Kunimasa Miyazaki
Using molecular dynamics simulation, we investigate the slow dynamics of a supercooled binary mixture of soft particles interacting with a generalized Hertzian potential. At low density, it displays typical slow dynamics near its glass transition temperature. At higher densities, particles bond toge…
[Phys. Rev. Lett. 117, 165701] Published Tue Oct 11, 2016

Origin of the Distinct Diffusion Behaviors of Cu and Ag in Covalent and Ionic Semiconductors

2016-10-11T10:00:00-04:00

Author(s): Hui-Xiong Deng, Jun-Wei Luo, Shu-Shen Li, and Su-Huai Wei
It is well known that Cu diffuses faster than Ag in covalent semiconductors such as Si, which has prevented the replacement of Ag by Cu as a contact material in Si solar cells for reducing the cost. Surprisingly, in more ionic materials such as CdTe, Ag diffuses faster than Cu despite that it is lar…
[Phys. Rev. Lett. 117, 165901] Published Tue Oct 11, 2016

Fermi Surface of Metallic V_{2} O_{3} from Angle-Resolved Photoemission: Mid-level Filling of e_{g}^{π} Bands

2016-10-11T10:00:00-04:00

Author(s): I. Lo Vecchio, J. D. Denlinger, O. Krupin, B. J. Kim, P. A. Metcalf, S. Lupi, J. W. Allen, and A. Lanzara
Using angle resolved photoemission spectroscopy, we report the first band dispersions and distinct features of the bulk Fermi surface (FS) in the paramagnetic metallic phase of the prototypical metal-insulator transition material V_{2}O_{3}. Along the c axis we observe both an electron pocket and a …
[Phys. Rev. Lett. 117, 166401] Published Tue Oct 11, 2016

Negative Magnetoresistance in Viscous Flow of Two-Dimensional Electrons

2016-10-11T10:00:00-04:00

Author(s): P. S. Alekseev
At low temperatures, in very clean two-dimensional (2D) samples, the electron mean free path for collisions with static defects and phonons becomes greater than the sample width. Under this condition, the electron transport occurs by formation of a viscous flow of an electron fluid. We study the vis…
[Phys. Rev. Lett. 117, 166601] Published Tue Oct 11, 2016

All Majorana Models with Translation Symmetry are Supersymmetric

2016-10-11T10:00:00-04:00

Author(s): Timothy H. Hsieh, Gábor B. Halász, and Tarun Grover
We establish results similar to Kramers and Lieb-Schultz-Mattis theorems but involving only translation symmetry and for Majorana modes. In particular, we show that all states are at least doubly degenerate in any one- and two-dimensional array of Majorana modes with translation symmetry, periodic b…
[Phys. Rev. Lett. 117, 166802] Published Tue Oct 11, 2016

Secondary Electron Interference from Trigonal Warping in Clean Carbon Nanotubes

2016-10-11T10:00:00-04:00

Author(s): A. Dirnaichner, M. del Valle, K. J. G. Götz, F. J. Schupp, N. Paradiso, M. Grifoni, Ch. Strunk, and A. K. Hüttel
We investigate Fabry-Perot interference in an ultraclean carbon nanotube resonator. The conductance shows a clear superstructure superimposed onto conventional Fabry-Perot oscillations. A sliding average over the fast oscillations reveals a characteristic slow modulation of the conductance as a func…
[Phys. Rev. Lett. 117, 166804] Published Tue Oct 11, 2016

Electron-Hole Asymmetric Chiral Breakdown of Reentrant Quantum Hall States

2016-10-11T10:00:00-04:00

Author(s): A. V. Rossokhaty, Y. Baum, J. A. Folk, J. D. Watson, G. C. Gardner, and M. J. Manfra
Reentrant integer quantum Hall (RIQH) states are believed to be correlated electron solid phases, although their microscopic description remains unclear. As bias current increases, longitudinal and Hall resistivities measured for these states exhibit multiple sharp breakdown transitions, a signature…
[Phys. Rev. Lett. 117, 166805] Published Tue Oct 11, 2016

Remarkable Stability of Charge Density Wave Order in La_{1.875} Ba_{0.125} CuO_{4}

2016-10-11T10:00:00-04:00

Author(s): X. M. Chen, V. Thampy, C. Mazzoli, A. M. Barbour, H. Miao, G. D. Gu, Y. Cao, J. M. Tranquada, M. P. M. Dean, and S. B. Wilkins
The occurrence of charge-density-wave (CDW) order in underdoped cuprates is now well established, although the precise nature of the CDW and its relationship with superconductivity is not. Theoretical proposals include contrasting ideas such as that pairing may be driven by CDW fluctuations or that …
[Phys. Rev. Lett. 117, 167001] Published Tue Oct 11, 2016

Classical Spin Liquid on the Maximally Frustrated Honeycomb Lattice

2016-10-11T10:00:00-04:00

Author(s): J. Rehn, Arnab Sen, Kedar Damle, and R. Moessner
We show that the honeycomb Heisenberg antiferromagnet with J_{1}/2=J_{2}=J_{3}, where J_{1}, J_{2}, and J_{3} are first-, second-, and third-neighbor couplings, respectively, forms a classical spin liquid with pinch-point singularities in the structure factor at the Brillouin zone corners. Upon dilu…
[Phys. Rev. Lett. 117, 167201] Published Tue Oct 11, 2016

Chiral Spin Liquids in Triangular-Lattice SU(N) Fermionic Mott Insulators with Artificial Gauge Fields

2016-10-11T10:00:00-04:00

Author(s): Pierre Nataf, Miklós Lajkó, Alexander Wietek, Karlo Penc, Frédéric Mila, and Andreas M. Läuchli
We show that, in the presence of a π/2 artificial gauge field per plaquette, Mott insulating phases of ultracold fermions with SU(N) symmetry and one particle per site generically possess an extended chiral phase with intrinsic topological order characterized by an approximate ground space of N low-…
[Phys. Rev. Lett. 117, 167202] Published Tue Oct 11, 2016

High-Fidelity and Ultrafast Initialization of a Hole Spin Bound to a Te Isoelectronic Center in ZnSe

2016-10-11T10:00:00-04:00

Author(s): P. St-Jean, G. Éthier-Majcher, R. André, and S. Francoeur
We demonstrate the optical initialization of a hole-spin qubit bound to an isoelectronic center (IC) formed by a pair of Te impurities in ZnSe, an impurity-host system providing high optical homogeneity, large electric dipole moments, and potentially advantageous coherence times. The initialization …
[Phys. Rev. Lett. 117, 167401] Published Tue Oct 11, 2016

Capillary Leveling of Freestanding Liquid Nanofilms

2016-10-11T10:00:00-04:00

Author(s): Mark Ilton, Miles M. P. Couchman, Cedric Gerbelot, Michael Benzaquen, Paul D. Fowler, Howard A. Stone, Elie Raphaël, Kari Dalnoki-Veress, and Thomas Salez
We report on the capillary-driven leveling of a topographical perturbation at the surface of a freestanding liquid nanofilm. The width of a stepped surface profile is found to evolve as the square root of time. The hydrodynamic model is in excellent agreement with the experimental data. In addition …
[Phys. Rev. Lett. 117, 167801] Published Tue Oct 11, 2016

Power-Law Entanglement Spectrum in Many-Body Localized Phases

2016-10-10T10:00:00-04:00

Author(s): Maksym Serbyn, Alexios A. Michailidis, Dmitry A. Abanin, and Z. Papić
The entanglement spectrum of the reduced density matrix contains information beyond the von Neumann entropy and provides unique insights into exotic orders or critical behavior of quantum systems. Here, we show that strongly disordered systems in the many-body localized phase have power-law entangle…
[Phys. Rev. Lett. 117, 160601] Published Mon Oct 10, 2016

Laser-Accelerated Ions from a Shock-Compressed Gas Foil

2016-10-10T10:00:00-04:00

Author(s): M. H. Helle, D. F. Gordon, D. Kaganovich, Y. Chen, J. P. Palastro, and A. Ting
We present results of energetic laser-ion acceleration from a tailored, near solid density gas target. Colliding hydrodynamic shocks compress a pure hydrogen gas jet into a 70  μm thick target prior to the arrival of the ultraintense laser pulse. A density scan reveals the transition from a regime c…
[Phys. Rev. Lett. 117, 165001] Published Mon Oct 10, 2016

Scanning Tunneling Microscopy of the π Magnetism of a Single Carbon Vacancy in Graphene

2016-10-10T10:00:00-04:00

Author(s): Yu Zhang, Si-Yu Li, Huaqing Huang, Wen-Tian Li, Jia-Bin Qiao, Wen-Xiao Wang, Long-Jing Yin, Ke-Ke Bai, Wenhui Duan, and Lin He
Pristine graphene is strongly diamagnetic. However, graphene with single carbon atom defects could exhibit paramagnetism. Theoretically, the π magnetism induced by the monovacancy in graphene is characteristic of two spin-split density-of-states (DOS) peaks close to the Dirac point. Since its predic…
[Phys. Rev. Lett. 117, 166801] Published Mon Oct 10, 2016

Quantum Correlations Are Stronger Than All Nonsignaling Correlations Produced by n-Outcome Measurements

2016-10-07T10:00:00-04:00

Author(s): Matthias Kleinmann and Adán Cabello
We show that, for any n, there are m-outcome quantum correlations, with m>n, which are stronger than any nonsignaling correlation produced from selecting among n-outcome measurements. As a consequence, for any n, there are m-outcome quantum measurements that cannot be constructed by selecting locally…
[Phys. Rev. Lett. 117, 150401] Published Fri Oct 07, 2016

Quantum Change Point

2016-10-07T10:00:00-04:00

Author(s): Gael Sentís, Emilio Bagan, John Calsamiglia, Giulio Chiribella, and Ramon Muñoz-Tapia
Sudden changes are ubiquitous in nature. Identifying them is crucial for a number of applications in biology, medicine, and social sciences. Here we take the problem of detecting sudden changes to the quantum domain. We consider a source that emits quantum particles in a default state, until a point…
[Phys. Rev. Lett. 117, 150502] Published Fri Oct 07, 2016

Doubly Magic Optical Trapping for Cs Atom Hyperfine Clock Transitions

2016-10-07T10:00:00-04:00

Author(s): A. W. Carr and M. Saffman
We analyze doubly magic trapping of Cs hyperfine transitions including previously neglected contributions from the ground state hyperpolarizability and the interaction of the laser light and a static magnetic field. Extensive numerical searches do not reveal any doubly magic trapping conditions for …
[Phys. Rev. Lett. 117, 150801] Published Fri Oct 07, 2016

Deciphering the Dipole Anisotropy of Galactic Cosmic Rays

2016-10-07T10:00:00-04:00

Author(s): Markus Ahlers
Recent measurements of the dipole anisotropy in the arrival directions of Galactic cosmic rays (CRs) indicate a strong energy dependence of the dipole amplitude and phase in the TeV–PeV range. We argue here that these observations can be well understood within standard diffusion theory as a combined…
[Phys. Rev. Lett. 117, 151103] Published Fri Oct 07, 2016

H.E.S.S. Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center

2016-10-07T10:00:00-04:00

Author(s): H. Abdalla et al. (H.E.S.S. Collaboration)
A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data ext…
[Phys. Rev. Lett. 117, 151302] Published Fri Oct 07, 2016

Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments

2016-10-07T10:00:00-04:00

Author(s): P. Adamson et al. (Daya Bay Collaboration, MINOS Collaboration)

An analysis of data from the MINOS, Daya Bay, and Bugey-3 experiments places stringent limits on the mass and mixing of a hypothetical sterile neutrino.

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[Phys. Rev. Lett. 117, 151801] Published Fri Oct 07, 2016

Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment

2016-10-07T10:00:00-04:00

Author(s): F. P. An et al. (Daya Bay Collaboration)
This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits fro…
[Phys. Rev. Lett. 117, 151802] Published Fri Oct 07, 2016

Search for Sterile Neutrinos Mixing with Muon Neutrinos in MINOS

2016-10-07T10:00:00-04:00

Author(s): P. Adamson et al. (MINOS Collaboration)
We report results of a search for oscillations involving a light sterile neutrino over distances of 1.04 and 735 km in a ν_{μ}-dominated beam with a peak energy of 3 GeV. The data, from an exposure of 10.56×10^{20} protons on target, are analyzed using a phenomenological model with one sterile neutr…
[Phys. Rev. Lett. 117, 151803] Published Fri Oct 07, 2016

Three-Jet Production in Electron-Positron Collisions at Next-to-Next-to-Leading Order Accuracy

2016-10-07T10:00:00-04:00

Author(s): Vittorio Del Duca, Claude Duhr, Adam Kardos, Gábor Somogyi, and Zoltán Trócsányi
We introduce a completely local subtraction method for fully differential predictions at next-to-next-to-leading order (NNLO) accuracy for jet cross sections and use it to compute event shapes in three-jet production in electron-positron collisions. We validate our method on two event shapes, thrust…
[Phys. Rev. Lett. 117, 152004] Published Fri Oct 07, 2016

Heteronuclear Efimov Scenario with Positive Intraspecies Scattering Length

2016-10-07T10:00:00-04:00

Author(s): Juris Ulmanis, Stephan Häfner, Rico Pires, Eva D. Kuhnle, Yujun Wang, Chris H. Greene, and Matthias Weidemüller
We investigate theoretically and experimentally the heteronuclear Efimov scenario for a three-body system that consists of two bosons and one distinguishable particle with positive intraspecies scattering lengths. The three-body parameter at the three-body scattering threshold and the scaling factor…
[Phys. Rev. Lett. 117, 153201] Published Fri Oct 07, 2016

Recombination-Enhanced Surface Expansion of Clusters in Intense Soft X-Ray Laser Pulses

2016-10-07T10:00:00-04:00

Author(s): Daniela Rupp, Leonie Flückiger, Marcus Adolph, Tais Gorkhover, Maria Krikunova, Jan Philippe Müller, Maria Müller, Tim Oelze, Yevheniy Ovcharenko, Benjamin Röben, Mario Sauppe, Sebastian Schorb, David Wolter, Rolf Mitzner, Michael Wöstmann, Sebastian Roling, Marion Harmand, Rolf Treusch, Mathias Arbeiter, Thomas Fennel, Christoph Bostedt, and Thomas Möller

Nanoplasmas, formed by irradiating xenon clusters with short intense soft x-ray pulses, undergo a previously unnoticed heating process due to electron-ion recombination within the plasma.

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[Phys. Rev. Lett. 117, 153401] Published Fri Oct 07, 2016

Coherence Constraints and the Last Hidden Optical Coherence

2016-10-07T10:00:00-04:00

Author(s): Xiao-Feng Qian, Tanya Malhotra, A. Nick Vamivakas, and Joseph H. Eberly
We have discovered a new domain of optical coherence, and show that it is the third and last member of a previously unreported fundamental triad of coherences. These are unified by our derivation of a parallel triad of coherence constraints that take the form of complementarity relations. We have be…
[Phys. Rev. Lett. 117, 153901] Published Fri Oct 07, 2016

Suppression of Noise-Induced Modulations in Multidelay Systems

2016-10-07T10:00:00-04:00

Author(s): Lina Jaurigue, Eckehard Schöll, and Kathy Lüdge
Many physical systems involve time-delayed feedback or coupling. In such delay systems, noise can give rise to undesirable oscillations at frequencies resonant to the delay times. We investigate how an additional feedback term can suppress noise-induced modulations in delay systems with self-feedbac…
[Phys. Rev. Lett. 117, 154101] Published Fri Oct 07, 2016

Ligament Mediated Fragmentation of Viscoelastic Liquids

2016-10-07T10:00:00-04:00

Author(s): Bavand Keshavarz, Eric C. Houze, John R. Moore, Michael R. Koerner, and Gareth H. McKinley
The breakup and atomization of complex fluids can be markedly different than the analogous processes in a simple Newtonian fluid. Atomization of paint, combustion of fuels containing antimisting agents, as well as physiological processes such as sneezing are common examples in which the atomized liq…
[Phys. Rev. Lett. 117, 154502] Published Fri Oct 07, 2016

Nondestructive Measurement of Orbital Angular Momentum for an Electron Beam

2016-10-07T10:00:00-04:00

Author(s): Hugo Larocque, Frédéric Bouchard, Vincenzo Grillo, Alicia Sit, Stefano Frabboni, Rafal E. Dunin-Borkowski, Miles J. Padgett, Robert W. Boyd, and Ebrahim Karimi
Free electrons with a helical phase front, referred to as “twisted” electrons, possess an orbital angular momentum (OAM) and, hence, a quantized magnetic dipole moment along their propagation direction. This intrinsic magnetic moment can be used to probe material properties. Twisted electrons thus h…
[Phys. Rev. Lett. 117, 154801] Published Fri Oct 07, 2016

Relaxor Ferroelectrics: Back to the Single-Soft-Mode Picture

2016-10-07T10:00:00-04:00

Author(s): B. Hehlen, M. Al-Sabbagh, A. Al-Zein, and J. Hlinka
The fluctuations of electric polarization in a disordered ferroelectric substance, relaxor crystal PbMg_{1/3}Nb_{2/3}O_{3} (PMN), were studied using a nonlinear inelastic light-scattering technique, hyper-Raman scattering, within a 5–100  cm^{−1} spectral interval and in a broad temperature range fr…
[Phys. Rev. Lett. 117, 155501] Published Fri Oct 07, 2016

Controlling Strain Bursts and Avalanches at the Nano- to Micrometer Scale

2016-10-07T10:00:00-04:00

Author(s): Yinan Cui, Giacomo Po, and Nasr Ghoniem
We demonstrate, through three-dimensional discrete dislocation dynamics simulations, that the complex dynamical response of nano- and microcrystals to external constraints can be tuned. Under load rate control, strain bursts are shown to exhibit scale-free avalanche statistics, similar to critical p…
[Phys. Rev. Lett. 117, 155502] Published Fri Oct 07, 2016

Phase-Field-Crystal Model for Electromigration in Metal Interconnects

2016-10-07T10:00:00-04:00

Author(s): Nan Wang, Kirk H. Bevan, and Nikolas Provatas
We propose an atomistic model of electromigration (EM) in metals based on a recently developed phase-field-crystal (PFC) technique. By coupling the PFC model’s atomic density field with an applied electric field through the EM effective charge parameter, EM is successfully captured on diffusive time…
[Phys. Rev. Lett. 117, 155901] Published Fri Oct 07, 2016

Proton Conductivity in Phosphoric Acid: The Role of Quantum Effects

2016-10-07T10:00:00-04:00

Author(s): M. Heres, Y. Wang, P. J. Griffin, C. Gainaru, and A. P. Sokolov
Phosphoric acid has one of the highest intrinsic proton conductivities of any known liquids, and the mechanism of this exceptional conductivity remains a puzzle. Our detailed experimental studies discovered a strong isotope effect in the conductivity of phosphoric acids caused by (i) a strong isotop…
[Phys. Rev. Lett. 117, 156001] Published Fri Oct 07, 2016

Uncoupled Dark States Can Inherit Polaritonic Properties

2016-10-07T10:00:00-04:00

Author(s): Carlos Gonzalez-Ballestero, Johannes Feist, Eduardo Gonzalo Badía, Esteban Moreno, and Francisco J. Garcia-Vidal
When a collection of quantum emitters interacts with an electromagnetic field, the whole system can enter into the collective strong coupling regime in which hybrid light-matter states, i.e., polaritons can be created. Only a small portion of excitations in the emitters are coupled to the light fiel…
[Phys. Rev. Lett. 117, 156402] Published Fri Oct 07, 2016

Ab Initio Quantum Monte Carlo Simulation of the Warm Dense Electron Gas in the Thermodynamic Limit

2016-10-07T10:00:00-04:00

Author(s): Tobias Dornheim, Simon Groth, Travis Sjostrom, Fionn D. Malone, W. M. C. Foulkes, and Michael Bonitz
We perform ab initio quantum Monte Carlo (QMC) simulations of the warm dense uniform electron gas in the thermodynamic limit. By combining QMC data with the linear response theory, we are able to remove finite-size errors from the potential energy over the substantial parts of the warm dense regime,…
[Phys. Rev. Lett. 117, 156403] Published Fri Oct 07, 2016

Highly Anisotropic and Twofold Symmetric Superconducting Gap in Nematically Ordered FeSe_{0.93} S_{0.07}

2016-10-07T10:00:00-04:00

Author(s): H. C. Xu, X. H. Niu, D. F. Xu, J. Jiang, Q. Yao, Q. Y. Chen, Q. Song, M. Abdel-Hafiez, D. A. Chareev, A. N. Vasiliev, Q. S. Wang, H. L. Wo, J. Zhao, R. Peng, and D. L. Feng
FeSe exhibits a novel ground state in which superconductivity coexists with a nematic order in the absence of any long-range magnetic order. Here, we report on an angle-resolved photoemission study on the superconducting gap structure in the nematic state of FeSe_{0.93}S_{0.07}, without the complica…
[Phys. Rev. Lett. 117, 157003] Published Fri Oct 07, 2016

Fractional Spin Fluctuations as a Precursor of Quantum Spin Liquids: Majorana Dynamical Mean-Field Study for the Kitaev Model

2016-10-07T10:00:00-04:00

Author(s): Junki Yoshitake, Joji Nasu, and Yukitoshi Motome
Experimental identification of quantum spin liquids remains a challenge, as the pristine nature is to be seen in asymptotically low temperatures. We here theoretically show that the precursor of quantum spin liquids appears in the spin dynamics in the paramagnetic state over a wide temperature range…
[Phys. Rev. Lett. 117, 157203] Published Fri Oct 07, 2016

Tunable Magnon Weyl Points in Ferromagnetic Pyrochlores

2016-10-07T10:00:00-04:00

Author(s): Alexander Mook, Jürgen Henk, and Ingrid Mertig
The dispersion relations of magnons in ferromagnetic pyrochlores with Dzyaloshinskii-Moriya interaction are shown to possess Weyl points, i. e., pairs of topologically nontrivial crossings of two magnon branches with opposite topological charge. As a consequence of their topological nature, their pr…
[Phys. Rev. Lett. 117, 157204] Published Fri Oct 07, 2016

Skyrmions with Attractive Interactions in an Ultrathin Magnetic Film

2016-10-07T10:00:00-04:00

Author(s): Levente Rózsa, András Deák, Eszter Simon, Rocio Yanes, László Udvardi, László Szunyogh, and Ulrich Nowak
We determined the parameters of a classical spin Hamiltonian describing an Fe monolayer on Pd(111) surface with a Pt_{1−x}Ir_{x} alloy overlayer from ab initio calculations. While the ground state of the system is ferromagnetic for x=0.00, it becomes a spin spiral state as Ir is intermixed into the …
[Phys. Rev. Lett. 117, 157205] Published Fri Oct 07, 2016

Comment on “Estimating Excitonic Effects in the Absorption Spectra of Solids: Problems and Insight from a Guided Iteration Scheme”

2016-10-07T10:00:00-04:00

Author(s): S. Sharma, J. K. Dewhurst, A. Sanna, and E. K. U. Gross
[Phys. Rev. Lett. 117, 159701] Published Fri Oct 07, 2016

Rigamonti et al. Reply:

2016-10-07T10:00:00-04:00

Author(s): Santiago Rigamonti, Silvana Botti, Valérie Veniard, Claudia Draxl, Lucia Reining, and Francesco Sottile
[Phys. Rev. Lett. 117, 159702] Published Fri Oct 07, 2016