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Persistent currents in disordered rings

M. MAŁCZAK1, M. MIERZEJEWSKI1, M. M. MAŚKA1,*

Affiliation

  1. Department of Theoretical Physics, Institute of Physics, University of Silesia, 40-007 Katowice, Poland

Abstract

Numerical calculations are performed to determine how persistent currents in mesoscopic metallic rings are affected by a diagonal disorder. We use a tight–binding model with long–range hoppings and the hopping integrals are assumed in such a way, that the resulting electron dispersion relation is almost the same as for free electrons. We analyze one– and two– dimensional rings. We discuss the dependence of the amplitude of the persistent current on the concentration of impurities and on their potential..

Keywords

Disordered rings, Mesoscopic, Persistent currents, Impurity.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

M. MAŁCZAK, M. MIERZEJEWSKI, M. M. MAŚKA, Persistent currents in disordered rings, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1740-1744 (2008)