Spin Dynamics in (111) GaAs/AlGaAs Undoped Asymmetric Quantum Wells

作     者：WANG Gang YE Hui-Qi SHI Zhen-Wu WANG Wen-Xin MARIE Xavier BALOCCHI Andrea AMAND Thierry LIU Bao-Li 王刚;叶慧琪;石震武;王文新;MARIE Xavier;BALOCCHI Andrea;AMAND Thierry;刘宝利

作者机构：Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190 Universitéde ToulouseINSA-CNRS-UPSLPCNO135 avenue de Rangueil31077 ToulouseFrance 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2012年第29卷第9期

页      面：159-161页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Supported by the China-France NSFC-ANR Research Project under Grant No 10911130356 Chinese Academy of Sciences under Grant No 2011T1J37 the National Basic Research Program of China(2009CB930500) National Science Foundation of China under Grant Nos 10774183 and 10874212 

主　　题：Quantum conduction directions 

摘      要：The electron spin dynamics is investigated by the time-resolved Kerr rotation technique in a pair of special GaAs/AlGaAs asymmetric quantum well samples grown on(111)-oriented substrates,whose structures are the same except for their opposite directions of potential asymmetry.A large difference of spin lifetimes between the two samples is observed at low *** difference is interpreted in terms of a cancellation effect between the Dresselhaus spin-splitting term in the conduction band and another term induced by interface inversion *** deviation decreases with the increasing temperature,and almost disappears when T100 K because the cubic Dresselhaus term becomes more important.