Proper definitions of persistent currents in mesoscopic Aharonov-Bohm interferometers

被引：2

作者：

Cho, Sam Young ^{[1
,2
]}

Wang, Hai Tao ^{[1
,2
]}

Choi, Taeseung ^{[3
]}

机构：

[1] Chongqing Univ, Ctr Modern Phys, Chongqing 400030, Peoples R China

[2] Chongqing Univ, Dept Phys, Chongqing 400030, Peoples R China

[3] Seoul Womens Univ, Barom Liberal Arts Coll, Seoul 139774, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 62卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Persistent currents; Aharonov-Bohm electronic interferometers; QUANTUM TRANSPORT; SPIN CURRENTS; SINGLE; RINGS;

D O I：

10.3938/jkps.62.496

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a long-standing ambiguity in the persistent currents (PCs), addressed by Buttiker in 1985 and by Jayannavar and Deo in 1995, of a mesoscopic loop connected to two electron reservoirs. In order to clarify the ambiguity, we investigated the PCs in Aharonov-Bohm (AB) interferometers. We show that there are two types of PCs. One can be induced by the quantum interference originating from the asymmetries of the upper and the lower interferometer arms for nonequilibrium. The other is induced by the AB flux. A proper current expression for each type is presented as a function of the AB flux. By applying the expressions for a one-dimensional AB loop interferometer, we find an anomalously giant PC induced by AB flux and show it to be a unique characteristic behavior in open mesoscopic loop systems be observed experimentally with current nanotechnologies.

引用

页码：496 / 501

页数：6

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