Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings

被引：21
|
作者：
Gambetti-Césare, E
Weinmann, D
Jalabert, RA
Brune, P
机构：
[1] ULP, Inst Phys & Chim Mat Strasbourg, CNRS, UMR 7504, F-67037 Strasbourg, France
[2] Univ Calif Santa Barbara, Inst Theoret Phys, Santa Barbara, CA 93106 USA
[3] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany
来源：
EUROPHYSICS LETTERS | 2002年 / 60卷 / 01期
关键词：
D O I：
10.1209/epl/i2002-00328-9
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that disorder increases the persistent current of a half- filled one-dimensional Hubbard- Anderson ring at strong interaction. This unexpected effect results from a perturbative expansion starting from the strongly interacting Mott insulator ground state. The analytical result is confirmed and extended by numerical calculations.
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页码：120 / 126
页数：7
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