The effect of k-cubic Dresselhaus spin orbit coupling on the decay time of persistent spin helix states in semiconductor two-dimensional electron gases  

作　　者：柴政 胡茂金 王瑞强 胡梁宾 

机构地区：[1]Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University

出　　处：《Chinese Physics B》2014年第2期437-442,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.10874049)

摘　　要：We study the theoretical effect of k-cubic （i.e, cubic-in-momentum） Dresselhaus spin-orbit coupling on the decay time of persistent spin helix states in semiconductor two-dimensional electron gases. We show that the decay time of persistent spin helix states may be suppressed substantially by k-cubic Dresselhaus spin-orbit coupling, and after taking the effect of k-cubic Dresselhaus spin-orbit interaction into account, the theoretical results obtained accord both qualitatively and quantitatively with other recent experimental results.We study the theoretical effect of k-cubic （i.e, cubic-in-momentum） Dresselhaus spin-orbit coupling on the decay time of persistent spin helix states in semiconductor two-dimensional electron gases. We show that the decay time of persistent spin helix states may be suppressed substantially by k-cubic Dresselhaus spin-orbit coupling, and after taking the effect of k-cubic Dresselhaus spin-orbit interaction into account, the theoretical results obtained accord both qualitatively and quantitatively with other recent experimental results.

关 键 词：persistent spin helix state Rashba spin-orbit coupling k-cubic Dresselhaus spin-orbit coupling decay time 

分 类 号：O471[理学—半导体物理]