SIGNIFICANT INTERACTION-INDUCED ENHANCEMENT OF PERSISTENT CURRENTS IN 2D DISORDERED CYLINDERS

被引：36

作者：

BERKOVITS, R ^{[1
]}

AVISHAI, Y ^{[1
]}

机构：

[1] BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL

来源：

EUROPHYSICS LETTERS | 1995年 / 29卷 / 06期

关键词：

D O I：

10.1209/0295-5075/29/6/008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The persistent current of small disordered 2D cylinders is calculated by an exact numerical diagonalization of a tight-binding interacting model Hamiltonian. A significant enhancement in the ensemble-averaged persistent current amplitude occurs for a certain range of electron-electron interaction strength. For similar 1D and quasi-1D geometries no significant enhancement is observed. This current enhancement is due to the shift of the onset point of the Mott-Hubbard metal insulator transition. Our results may provide an explanation to a longstanding problem in mesoscopic physics, namely, the high values of persistent current measured in experiment.

引用

页码：475 / 480

页数：6

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