Effect of increasing disorder on the critical behavior of a Coulomb system

2004/08/10 by Michael H. Overlin, Lee A. Wong, Clare C. Yu · 2 citations
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Material Dynamics and Properties #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevb.70.214203

14 pages, Latex, 21 encapsulated postscript figures, to be published in Phys. Rev. B

arxiv created 2004/08/10 · openalex publication_date 2004/12/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have performed a Monte Carlo study of a classical three-dimensional Coulomb system in which we systematically increase the positional disorder. We start from a completely ordered system and gradually transition to a Coulomb glass. The phase transition as a function of temperature is second order for all values of disorder. We use finite size scaling to determine the transition temperature T_C and the critical exponent \ensuremathν. We find that T_C decreases and that \ensuremathν increases with increasing disorder. We also observe changes in the specific heat, the single-particle density of states, and the staggered occupation as a function of disorder and temperature.

Citations

• Short-range type critical behavior in spite of long-range interactions: the phase transition of a Coulomb system on a lattice
• Coulomb gap and low temperature conductivity of disordered systems
• Simulation of electrostatic systems in periodic boundary conditions. I. Lattice sums and dielectric constants

Cited by

• Finite temperature phase transition in the two-dimensional Coulomb glass at low disorders
• Critical behavior of the two-dimensional Coulomb glass at zero temperature