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.
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收藏
页码：475 / 480
页数：6
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