The effect of k-cubic Dresselhaus spin orbit coupling on the decay time of persistent spin helix sta

• 作 者: 柴政 胡茂金 王瑞强 胡梁宾
• 机 构: Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engi
• 出 处: Chinese Physics B
• 发表日期: 2014年02期
• 关键词: cubic decay helix gases orbit persistent quantitatively anomalous accord suppres

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 (iecubic-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 accordantly qualitatively and quantitatively with other recent experimental results.