Homogeneous nucleation of opposite moving dipole domains and current self-oscillations in undoped photoexcited superlattices

被引：0
|
作者：
Arana, J. I. [1 ]
Bonilla, L. L. [1 ]
Grahn, H. T. [2 ]
机构：
[1] Univ Carlos III Madrid, Leganes 28911, Spain
[2] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 05期
关键词：
charge transport in photoexcited semiconductor superlattices; current self-oscillations; dipole nucleation;
D O I：
10.1016/j.physe.2007.08.110
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A model for charge transport in undoped photoexcited semiconductor superlattices with field-dependent recombination is proposed and analyzed. Under dc voltage bias and large photoexcitation, there appear self-sustained oscillations of the current due to repeated homogeneous nucleation of a number of charge dipole waves inside the sample. Different from the case of a constant recombination coefficient, nucleated dipole waves may split in two oppositely moving dipoles. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：1209 / 1211
页数：3
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