Flexoelectricity Stretches to New Materials

In 2007, researchers in the United Kingdom observed flexoelectricity–a polarization due to a strain gradient–in SrTiO3. This effect had previously only been seen in liquid crystals and ceramics. This observation called the origins of flexoelectricity into question, and also revealed that the ferroelastic domain walls are polarized, even though the domains themselves are not.

Strain-Gradient-Induced Polarization in SrTiO3 Single Crystals
P. Zubko, G. Catalan, A. Buckley, P. R. L. Welche, and J. F. Scott
Phys. Rev. Lett. 99, 167601 (2007)

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Importance of σ Bonding Electrons for the Accurate Description of Electron Correlation in Graphene

Electron correlations in graphene are characterized via first principles calculations, showing that bonding of σ electrons is important in understanding the low energy physics of graphene.

Huihuo Zheng, Yu Gan, Peter Abbamonte, and Lucas K. Wagner
Phys. Rev. Lett. 119, 166402 (2017)


Atoms Feel New Force

October 19, 2017

Laser light can stretch and squeeze a whole cloud of atoms with a collective force.

Synopsis on:
Noam Matzliah et al.
Phys. Rev. Lett. 119, 163201 (2017)

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GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

October 19, 2017

Frame from a simulation depicting the inspiral phase of the first observed binary neutron star merger [credit: T. Dietrich (FSU/AEI); BAM Collaboration]. Selected for a Viewpoint in Physics and an Editors’ Suggestion.

B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)
Phys. Rev. Lett. 119, 161101 (2017)

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Band Filling Control of the Dzyaloshinskii-Moriya Interaction in Weakly Ferromagnetic Insulators

The evolution of the sign of the Dzyaloshinskii-Moriya interaction is determined with phase sensitive x-ray magnetic diffraction, through interference between quadrupole resonant and non-resonant magnetic scattering.

G. Beutier et al.
Phys. Rev. Lett. 119, 167201 (2017)

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Coulometry and Calorimetry of Electric Double Layer Formation in Porous Electrodes

Two new experimental techniques that make coulometric and calorimetric measurements of porous electrodes are used to obtain the entropic contribution to the grand potential. The new results differ significantly from theoretical predictions.

Mathijs Janssen et al.
Phys. Rev. Lett. 119, 166002 (2017)


Theory for 1D Quantum Materials Tested with Cold Atoms and Superconductors

October 18, 2017

The Tomonaga-Luttinger theory describing one-dimensional materials has been tested with cold atoms and arrays of Josephson junctions.

Viewpoint on:
Bing Yang et al.
Phys. Rev. Lett. 119, 165701 (2017)

Karin Cedergren et al.
Phys. Rev. Lett. 119, 167701 (2017)

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Dynamo Action in a Quasi-Keplerian Taylor-Couette Flow

Numerical evidence is provided for self-sustaining dynamo action in a confined electrically conducting fluid, such as an astrophysical accretion disc.

Anna Guseva, Rainer Hollerbach, Ashley P. Willis, and Marc Avila
Phys. Rev. Lett. 119, 164501 (2017)

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Are Gravitational Waves Spinning Down PSR J1023+0038?

A pulsar PSR J1023+0038 switches between two states that have different spin-down rates. A new analysis suggests that this discrepancy may be due to gravitational wave emission.

B. Haskell and A. Patruno
Phys. Rev. Lett. 119, 161103 (2017)


Direct View of Exchange Symmetry

October 16, 2017

A proposed set of experiments could offer a direct measurement of the fundamental quantum property that distinguishes fermions from bosons.

Synopsis on:
C. F. Roos et al.
Phys. Rev. Lett. 119, 160401 (2017)


Neutron Star Merger Seen and Heard

October 16, 2017

For the first time, researchers have detected both light and gravitational waves from the same event in space.

Viewpoint on:
B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)
Phys. Rev. Lett. 119, 161101 (2017)

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Scalable Creation of Long-Lived Multipartite Entanglement

A four-qubit entangled state is created in a scalable ion trap system, with fidelity exceeding 90%.

H. Kaufmann et al.
Phys. Rev. Lett. 119, 150503 (2017)

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Topological Hopf and Chain Link Semimetal States and Their Application to Co2MnGa

A new topological semimetal state is predicted, featuring three-dimensional band crossings that manifest as perpendicular, nontrivial links.

Guoqing Chang et al.
Phys. Rev. Lett. 119, 156401 (2017)

Current Issue

Vol. 119, Iss. 16 — 20 October 2017

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2017 Nobel Prize in Physics
October 3, 2017

APS congratulates Rainer Weiss, Barry C. Barish, and Kip S. Thorne for winning the 2017 Nobel Prize in Physics “for decisive contributions to the LIGO detector and the observation of gravitational waves.”
APS News Article

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