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Manipulation of Persistent Spin Helix States by Weak External Magnetic Fields

Manipulation of Persistent Spin Helix States by Weak External Magnetic Fields
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摘要 We study theoretically the effect of weak external magnetic fields on persistent spin helix states in semiconductor two-dimensional electron gases with both Rashba and linear-in-momentum Dresselhaus spin-orbit coupling.We show that in the presence of weak external magnetic fields, some basic properties of a persistent spin helix state,including the dispersion relation between the decay time and the magnitude of the wavevector, the maximum decay time and the value of the characteristic magnitude of the wavevector at which the maximum decay time occurs, will all depend sensitively on the directions of applied external magnetic fields.
出处 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第3期385-390,共6页 理论物理通讯(英文版)
基金 Supported by the National Natural Science Foundation of China under Grant No.10874049
关键词 spin-orbit coupling persistent spin helix state effect of weak external magnetic field 自旋轨道耦合 外部磁场 螺旋 操纵 衰减时间 电子气体 色散关系 外加磁场
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