Dynamics of tilted superlattices with time-dependent impurity

被引：1

作者：

Yan, W. X. ^{[1
]}

Xie, B.-H.

Jin, Shuo

机构：

[1] Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Peoples R China

[2] Beijing Informat Technol Inst, Beijing 100101, Peoples R China

[3] Beihang Univ, Dept Phys, Beijing 100083, Peoples R China

来源：

PHYSICS LETTERS A | 2007年 / 369卷 / 03期

基金：

中国国家自然科学基金;

关键词：

quasienergy; Floquet replica; Wannier-Stark ladders; density of state;

D O I：

10.1016/j.physleta.2007.04.081

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of time-dependent impurity on the electronic and transport properties of the tilted superlattices modeled by the tight-binding Hamiltonian is investigated. The quasienergies of the system are calculated in two methods: exact diagonalization and Floquet replica technique, the subtle effects of the impurity on the dynamics of the system are discussed in detail. Through a perturbative analysis in terms of the inverse of the time-dependent impurity frequency, we obtain the time-independent effective Hamiltonian, whose reliability and physical implication are discussed. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：243 / 248

页数：6

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