牛志平
开通时间:..
最后更新时间:..
点击次数:
所属单位:理学院
发表刊物:JOURNAL OF PHYSICS D-APPLIED PHYSICS
关键字:spin precession spin field effect transistor Rashba spin-orbit interaction Floquet theory
摘要:Perfect spin precession in a two dimensional electron gas is the basis of the Datta-Das spin field effect transistor. However, in a two dimensional system this ideal spin precession can be washed out by the intersubband mixing effects induced by the Rashba spin-orbit interaction. Here, we propose by applying an off-resonant linearly polarized light a perfect spin modulation of conductance can be demonstrated in a two dimensional spin field effect transistor. This is because in a two dimensional electron gas due to the renormalization of the Rashba spin-orbit coupling strength and the hopping amplitude by the light, the intersubband mixing effects can be weakened. For an appropriate intensity of the light, the intersubband mixing effects are completely suppressed. These phenomena provide a promising way to design an optically-controlled spintronics device.
ISSN号:0022-3727
是否译文:否
发表时间:2019-11-27
通讯作者:牛志平