uu.seUppsala universitets publikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Langevin Dynamics with Spatial Correlations as a Model for Electron-Phonon Coupling
Lawrence Livermore Natl Lab, Quantum Simulat Grp, Livermore, CA 94550 USA.
Virginia Polytech Inst & State Univ, Dept Mech Engn, Arlington, VA 22033 USA.
George Washington Univ, Ashburn, VA 20147 USA.
Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2009, Oak Ridge, TN 37831 USA.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, nr 18, artikkel-id 185501Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Stochastic Langevin dynamics has been traditionally used as a tool to describe nonequilibrium processes. When utilized in systems with collective modes, traditional Langevin dynamics relaxes all modes indiscriminately, regardless of their wavelength. We propose a generalization of Langevin dynamics that can capture a differential coupling between collective modes and the bath, by introducing spatial correlations in the random forces. This allows modeling the electronic subsystem in a metal as a generalized Langevin bath endowed with a concept of locality, greatly improving the capabilities of the two-temperature model. The specific form proposed here for the spatial correlations produces a physical wave-vector and polarization dependency of the relaxation produced by the electron-phonon coupling in a solid. We show that the resulting model can be used for describing the path to equilibration of ions and electrons and also as a thermostat to sample the equilibrium canonical ensemble. By extension, the family of models presented here can be applied in general to any dense system, solids, alloys, and dense plasmas. As an example, we apply the model to study the nonequilibrium dynamics of an electron-ion two-temperature Ni crystal.

sted, utgiver, år, opplag, sider
American Physical Society, 2018. Vol. 120, nr 18, artikkel-id 185501
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-357017DOI: 10.1103/PhysRevLett.120.185501ISI: 000432979900025PubMedID: 29775371OAI: oai:DiVA.org:uu-357017DiVA, id: diva2:1238164
Tilgjengelig fra: 2018-08-13 Laget: 2018-08-13 Sist oppdatert: 2018-08-13bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstPubMed

Personposter BETA

Klintenberg, Mattias

Søk i DiVA

Av forfatter/redaktør
Klintenberg, Mattias
Av organisasjonen
I samme tidsskrift
Physical Review Letters

Søk utenfor DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric

doi
pubmed
urn-nbn
Totalt: 12 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf