Effects of spin-orbit interaction and magnetic field on the electron transport in quasi-1D ferromagnetic/semiconductor/ferromagnetic system
Li Yu-Xian (李玉现)ab, Li Bo-Zang (李伯臧)a
a Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
Abstract Based on the transfer matrix method, we investigate the effects of Rashba spin-orbit interaction and magnetic field on the electron transport in a quasi one-dimensional FM/S/FM system, where FM and S represent the ferromagnetic metal and semiconductor, respectively. The results show that the oscillating scope of the transmission increases with the magnetic field increasing. In the antiferromagnetic alignment, the spin-up and spin-down electrons have the same contribution to the transmission even if a magnetic field is applied. In the ferromagnetic alignment, however, at certain strengths of Rashba spin-orbit interaction and of magnetic field, the transmission coefficient for spin-up electrons is bigger than that for spin-down electrons, and the sign of the spin polarization changes, which is opposite to that in the absence of the magnetic field.
Received: 22 October 2004
Revised: 06 January 2005
Accepted manuscript online:
Li Yu-Xian (李玉现), Li Bo-Zang (李伯臧) Effects of spin-orbit interaction and magnetic field on the electron transport in quasi-1D ferromagnetic/semiconductor/ferromagnetic system 2005 Chinese Physics 14 1021
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