Phase-ordering kinetics of the asymmetric Coulomb glass model

Preeti Bhandari, Vikas Malik, Sanjay Puri

Research output: Contribution to journalArticlepeer-review

Abstract

We present results for phase-ordering kinetics in the Coulomb glass (CG) model, which describes electrons on a lattice with unscreened Coulombic repulsion. The filling factor is denoted by K∈[0,1]. For a square lattice with K=0.5 (symmetric CG), the ground state is a checkerboard with alternating electrons and holes. In this paper, we focus on the asymmetric CG where K≲0.5, i.e., the ground state is checkerboard-like with excess holes distributed uniformly. There is no explicit quenched disorder in our system, though the Coulombic interaction gives rise to frustration. We find that the evolution morphology is in the same dynamical universality class as the ordering ferromagnet. Further, the domain growth law is slightly slower than the Lifshitz-Cahn-Allen law, L(t)∼t1/2, i.e., the growth exponent is underestimated. We speculate that this could be a signature of logarithmic growth in the asymptotic regime.

Original languageEnglish
Article number014135
JournalPhysical Review E
Volume109
Issue number1
DOIs
StatePublished - 1 Jan 2024

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

Fingerprint

Dive into the research topics of 'Phase-ordering kinetics of the asymmetric Coulomb glass model'. Together they form a unique fingerprint.

Cite this