SUPPRESSION OF PERSISTENT CURRENTS IN ONE-DIMENSIONAL DISORDERED RINGS BY THE COULOMB INTERACTION

被引：105

作者：

KATO, H

YOSHIOKA, D

机构：

[1] Institute of Physics, College of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.50.4943

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of the Coulomb interaction on persistent currents in disordered one-dimensional rings are investigated numerically. First, the effectiveness of the Hartree-Fock approximation is established on small systems. Then the calculations are performed for systems with 40 electrons in 100 sites. It is found that the amplitude of the average persistent current in the diffusive regime is suppressed as the strength of the Coulomb interaction increases. The suppression of the current is stronger in larger rings than in smaller ones. The enhancement of the current by the electron-electron interaction was not observed in the diffusive regime.

引用

页码：4943 / 4946

页数：4

共 20 条

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