AC shot noise through a quantum dot in the Kondo regime

被引：2
|
作者：
Yang, Kai-Hua [1 ]
Wu, Yan-Ju [1 ]
Chen, Yang [1 ]
机构：
[1] Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
来源：
PHYSICS LETTERS A | 2011年 / 375卷 / 33期
基金：
北京市自然科学基金;
关键词：
TRANSPORT; EQUILIBRIUM; SUPPRESSION; IMPURITY; PHYSICS;
D O I：
10.1016/j.physleta.2011.06.059
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The photon-assisted shot noise through a quantum dot in the Kondo regime is investigated by applying time-dependent canonical transformation and non-crossing approximation technique. A basic formula for the photon-assisted shot noise is obtained. The rich dependence of the shot noise on the external ac field and temperature is displayed. At low temperature and low frequencies, the differential shot noise exhibits staircase behavior. When the temperature increases, the steps are rounded. At elevated frequencies, the photon-assisted tunneling becomes more obvious. We have also found that the Fano factor is enhanced as the ac frequency is enhanced. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3037 / 3043
页数：7
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