Results 101 to 110 of about 93,863 (276)

Field control of quasiparticle decay in a quantum antiferromagnet

Nature Communications
Dynamics in a quantum material is described by quantized collective motion: a quasiparticle. The single-quasiparticle description is useful for a basic understanding of the system, whereas a phenomenon beyond the simple description such as quasiparticle ...
Shunsuke Hasegawa, Hodaka Kikuchi, Shinichiro Asai, Zijun Wei, Barry Winn, Gabriele Sala, Shinichi Itoh, Takatsugu Masuda   +7 more
doaj   +1 more source

Non-Adiabatic Excited-State Time-Dependent GW (TDGW) Molecular Dynamics Simulation of Nickel-Atom Aided Photolysis of Methane to Produce a Hydrogen Molecule

Nanomaterials
Methane photolysis is a very important initiation reaction from the perspective of hydrogen production for alternative energy applications. In our recent work, we demonstrated using our recently developed novel method, non-adiabatic excited-state time ...
Aaditya Manjanath, Ryoji Sahara, Yoshiyuki Kawazoe, Kaoru Ohno   +3 more
doaj   +1 more source

Lifshitz Transition in Correlated Topological Semimetals

Advanced Science, EarlyView.
Theoretical calculations reveal that in YPtBi and GdPtBi, strong electronic correlations shift topological Dirac nodes away from the Fermi level by forming large hole pockets. This effect is sensitive to temperature and arises from interactions among 4d or 4f electrons, offering insights into Fermi surface engineering in quantum materials.
Byungkyun Kang, Myoung‐Hwan Kim, Chul Hong Park, Anderson Janotti, Eunja Kim   +4 more
wiley   +1 more source

Major Role of Multiscale Entropy Evolution in Complex Systems and Data Science

Entropy
Complex systems are prevalent in various disciplines encompassing the natural and social sciences, such as physics, biology, economics, and sociology. Leveraging data science techniques, particularly those rooted in artificial intelligence and machine ...
Shahid Nawaz, Muhammad Saleem, Fedor V. Kusmartsev, Dalaver H. Anjum   +3 more
doaj   +1 more source

Quasiparticle scattering time in superconducting films: from dirty to clean limit

, 2011
We study the quasiparticle energy relaxation processes in superconducting Nb films of different thicknesses corresponding to different electron mean free paths in a state far from equilibrium, that is the highly dissipative flux-flow state driven up to ...
A. A. Abrikosov, A. I. Larkin, A. I. Larkin, A. Leo, A. Nigro, C. P. Poole Jr., D. J. Scalapino, G. Grimaldi, G. M. Eliashberg, G. M. Eliashberg, G. M. Eliashberg, G. M. Eliashberg, R. C. Weast, R. Citro, R. D. Parks, R. P. Huebener, R. P. Huebener, S. Pace   +17 more
core   +1 more source

Quasiparticle cosmology

Physical Review D
We consider thermodynamics of the Universe within a quasiparticle approach where the collective dynamics of a system is governed by the thermal mass of the constituents. The spacetime dependence of this thermal mass leads to a negative contribution to the pressure and a positive contribution to the energy density, similar to the effect due to dark ...
openaire   +2 more sources

Spectroscopic Evidence of Edge‐Localized States in an Antiferromagnet Topological Insulator NdBi

Advanced Science, EarlyView.
Using spin‐polarized scanning tunneling microscopy (STM) in conjunction with quasiparticle interference, we successfully identify distinct signatures of the ferromagnetic and antiferromagnetic terminations in NdBi, a rare‐earth monopnictide exhibiting non‐trivial topology and magnetism. We demonstrate that step edges on ferromagnetic surfaces host well‐
Avior Almoalem, Rebecca Chan, Brinda Kuthanazhi, Juan Schmidt, Jose A. Moreno, Hermann Suderow, Paul Canfield, Taylor L. Hughes, Vidya Madhavan   +8 more
wiley   +1 more source

Quasiparticle Properties of a Mobile Impurity in a Bose-Einstein Condensate. [PDF]

Physical Review Letters, 2015
We develop a systematic perturbation theory for the quasiparticle properties of a single impurity immersed in a Bose-Einstein condensate. Analytical results are derived for the impurity energy, effective mass, and residue to third order in the impurity ...
Rasmus S. Christensen, J. Levinsen, G. Bruun   +2 more
semanticscholar   +1 more source

Superradiance and Broadband Emission Driving Fast Electron Dephasing in Open Quantum Systems

Advanced Science, EarlyView.
We uncover the physical origin of ultrafast electron dephasing in solid‐state high‐harmonic generation by simulating the Lindblad equation for the dissipative Hubbard model. Coexistence of Dicke superradiance and broadband emission is revealed, whose destructive interference shortens the effective scattering time and provides a unified picture of ...
Gimin Bae, Youngjae Kim, Jae Dong Lee
wiley   +1 more source

Quasiparticle band structure and tight-binding model for single- and bilayer black phosphorus [PDF]

, 2014
By performing ab initio calculations for one- to four-layer black phosphorus within the $GW$ approximation, we obtain a significant difference in the band gap ($\ensuremath{\sim}$1.5 eV), which is in line with recent experimental data.
A. Rudenko, M. Katsnelson
semanticscholar   +1 more source