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Superconductivity (SC) occurring at low densities of mobile electrons is still a mystery since the standard theories do not apply in this regime. We address this problem by using a microscopic model for ferroelectric (FE) modes, which…

Superconductivity · Physics 2018-12-19 Yaron Kedem

Low accuracy of the Solvation Free Energy (SFE) calculation is a known problem of the numerical methods of the Integral Equation Theory of Liquids and the Classical Density Functional Theory (Classical DFT). Although functionals with…

Soft Condensed Matter · Physics 2015-09-07 Volodymyr Sergiievskyi , Guillaume Jeanmairet , Maximilien Levesque , Daniel Borgis

We have performed soft x-ray and ultrahigh-resolution laser-excited photoemission measurements on tetragonal FeSe, which was recently identified as a superconductor. Energy dependent study of valence band is compared to band structure…

Field electron emission (FE) has relevance in many different technological contexts. However, many related technological papers use a physically defective elementary FE equation for local emission current density (LECD). This equation takes…

Mesoscale and Nanoscale Physics · Physics 2020-01-08 Richard G. Forbes

In particle systems, flocking refers to the phenomenon where particles' individual velocities eventually align. The Cucker-Smale model is a well-known mathematical framework that describes this behavior. Many continuous descriptions of the…

Analysis of PDEs · Mathematics 2024-07-29 Sebastian Zimper , Federico Cornalba , Nataša Djurdjevac Conrad , Ana Djurdjevac

FeSe is an iron-based superconductor of immense current interest due to the large enhancements of Tc that occur when it is pressurized or grown as a single layer on an insulating substrate. Here we report precision measurements of its…

Superconductivity · Physics 2016-08-03 Meng Li , N. R. Lee-Hone , Shun Chi , Ruixing Liang , W. N. Hardy , D. A. Bonn , E. Girt , D. M. Broun

Particle dynamics in the electron current layer in collisionless magnetic reconnection is investigated by using a particle-in-cell simulation. Electron motion and velocity distribution functions are studied by tracking self-consistent…

Solar and Stellar Astrophysics · Physics 2016-10-06 Seiji Zenitani , Tsugunobu Nagai

We report neutron inelastic scattering measurements on polycrystalline LaFePO and Sr2ScO3FeP, two members of the iron phosphide families of superconductors. No evidence is found for any magnetic fluctuations in the spectrum of either…

Superconductivity · Physics 2013-10-25 A. E. Taylor , R. A. Ewings , T. G. Perring , D. R. Parker , J. Ollivier , S. J. Clarke , A. T. Boothroyd

Electro-vortex flows (EVF) arise in conducting fluids due to diverging current lines and the non-conservative Lorentz force. They are typically characterized by the $S$ parameter, defined as $S=\mu _0 I^2/4\pi^2 \rho \nu^2$, where it is…

Fluid Dynamics · Physics 2026-05-19 Swapnil Soni , Avishek Ranjan

Recent work has made it clear that the ``standard model'' of pulsar radio emission cannot be the full answer. Some fundamental assumptions about the magnetic field and plasma flow in the radio-loud region have been called into question by…

Astrophysics · Physics 2007-05-23 J. A. Eilek , T. H. Hankins , A. Jessner

The coupling between superconductivity and othorhombic distortion is studied in vapor-grown FeSe single crystals using high-resolution thermal-expansion measurements. In contrast to the Ba122-based (Ba122) superconductors, we find that…

Superconductivity · Physics 2015-06-15 A. E. Böhmer , F. Hardy , F. Eilers , D. Ernst , P. Adelmann , P. Schweiss , T. Wolf , C. Meingast

Experiments in particle physics have hitherto failed to produce any significant evidence for the many explicit models of physics beyond the Standard Model (BSM) that had been proposed over the past decades. As a result, physicists have…

History and Philosophy of Physics · Physics 2022-01-24 Philip Bechtle , Cristin Chall , Martin King , Michael Kraemer , Peter Maettig , Michael Stoeltzner

A very fundamental and unconventional characteristic of superconductivity in iron-based materials is that it occurs in the vicinity of {\it two} other instabilities. Apart from a tendency towards magnetic order, these Fe-based systems have…

Superconductivity · Physics 2015-01-26 S. -H. Baek , D. V. Efremov , J. M. Ok , J. S. Kim , Jeroen van den Brink , B. Büchner

We have computed the correlated electronic structure of FeSe and its dependence on the A1g mode versus compression. Using the self-consistent density functional theory - dynamical mean field theory (DFT-DMFT) with continuous time quantum…

Superconductivity · Physics 2015-06-18 Subhasish Mandal , R. E. Cohen , K. Haule

In this study we propose a classification scheme for the phenomenon of subpulse drifting in pulsars. We have assembled an exhaustive list of pulsars which exhibit subpulse drifting from previously published results as well as recent…

High Energy Astrophysical Phenomena · Physics 2018-10-31 Rahul Basu , Dipanjan Mitra , George I. Melikidze , Anna Skrzypczak

In recent papers by the authors (S.~Motonaga and K.~Yagasaki, Obstructions to integrability of nearly integrable dynamical systems near regular level sets, submitted for publication, and K.~Yagasaki, Nonintegrability of nearly integrable…

Dynamical Systems · Mathematics 2022-01-17 Shoya Motonaga , Kazuyuki Yagasaki

Our paper [Phys. Rev. A 93, 052512 (2016)], proposing a novel form of single determinant wave function that admits non-idempotent 1-electron density matrices, has recently received a Comment [Phys. Rev. A ??, 0????? (2017)] suggesting a…

Chemical Physics · Physics 2017-08-22 Hubertus J. J. van Dam

(abridged) Pulsar activity and its related radiation mechanism are usually explained by invoking some plasma processes occurring inside the magnetosphere. Despite many detailed local investigations, the global electrodynamics around those…

High Energy Astrophysical Phenomena · Physics 2015-06-05 J. Pétri

Recently published Density Functional Theory results from Whaley-Baldwin et. al. [New J. Phys. 22 023020, Feb 2020] using the PBE functional suggest that elemental sulfur does not adopt the simple-cubic (SC) $Pm\bar{3}m$ phase at high…

Materials Science · Physics 2020-12-07 Jack A. J. Whaley-Baldwin

The nature of the magnetic correlations in Fe-based superconductors remains a matter of controversy. To address this issue, we use inelastic neutron scattering to characterize the strength and temperature dependence of low-energy spin…

Superconductivity · Physics 2012-03-20 Zhijun Xu , Jinsheng Wen , Guangyong Xu , Songxue Chi , Wei Ku , Genda Gu , J. M. Tranquada
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