Generalized Coulomb Gap in the Spherical Version of a Lattice Model of Disordered and Correlated Localized Particles

Author

Thomas Vojta, Missouri University of Science and TechnologyFollow
Michael Schreiber

Abstract

We study the spherical version of a model of localized particles in a random potential which are subject to a power-law interaction U_ij ~ r_ij^-σ. In the case of a repulsive interaction with σ = 1 the model is identical to the spherical version of the Coulomb-glass model of disordered localized electrons. The use of continuous variables instead of discrete occupation numbers of the sites renders the model exactly solvable. Analytic results are obtained for the free energy and for the single-particle density of states (DOS) as an example for single-particle properties. The zero-temperature DOS shows a hard gap close to the chemical potential.

Recommended Citation

T. Vojta and M. Schreiber, "Generalized Coulomb Gap in the Spherical Version of a Lattice Model of Disordered and Correlated Localized Particles," Physical Review B (Condensed Matter), vol. 49, no. 12, pp. 7861 - 7867, American Physical Society (APS), Mar 1994.

The definitive version is available at https://doi.org/10.1103/PhysRevB.49.7861

Department(s)

Physics

International Standard Serial Number (ISSN)

0163-1829

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1994 American Physical Society (APS), All rights reserved.

Publication Date

01 Mar 1994