Relaxation and possible dynamical transition in electron glass

Preeti Bhandari, Vikas Malik, Deepak Kumar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have considered here the relaxation properties of three dimensional lattice model of an electron glass. We have modeled the kinetics of site-occupation numbers as Ising spins by Kawasaki Dynamics. The master equation governing the dynamics is approximated by making mean field approximation. We have calculated the eigenvalues and localization characteristics of the linear dynamical matrix. The behavior of the eigenvalues at different temperatures is used to detect the presence of a possible dynamical transition. We have also calculated eigenvalues of inverse susceptibility matrix and its behavior with temperature is used as additional input to analyze the slow dynamics and aging. Due to localized states having long lifetime the dynamics of the system slows down with decreasing temperature. We found the gap exponent of density of states of Hartree energy to be close to δ≈d-1 as predicted by Efros and Shklovskii.

Original languageEnglish
Title of host publicationDAE Solid State Physics Symposium 2016
EditorsSurendra Singh, Saibal Basu, Shovit Bhattacharya, Amitabh Das
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735415003
DOIs
StatePublished - 19 May 2017
Externally publishedYes
Event61st DAE Solid State Physics Symposium - Bhubaneswar, Odisha, India
Duration: 26 Dec 201630 Dec 2016

Publication series

NameAIP Conference Proceedings
Volume1832
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference61st DAE Solid State Physics Symposium
Country/TerritoryIndia
CityBhubaneswar, Odisha
Period26/12/1630/12/16

Keywords

  • dynamical mean-field theory
  • Electron glass
  • glass transition

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