| 铁磁/半导体/铁磁异质结构的自旋极化输运 |
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| 引用本文： | 张红梅,刘德.铁磁/半导体/铁磁异质结构的自旋极化输运[J].河北师范大学学报(自然科学版),2007,31(3):341-344. |
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| 作者姓名： | 张红梅 刘德 |
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| 作者单位： | 1. 河北科技大学,理学院,河北,石家庄,050054
2. 河北师范大学,物理科学与信息工程学院,河北,石家庄,050016 |
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| 摘 要： | 采用相干量子输运理论和传递矩阵方法,研究了具有不同自旋指向的极化电子渡越铁磁/半导体/铁磁异质结构的隧穿几率和自旋极化率.研究表明,隧穿几率和自旋极化率随半导体长度的改变发生周期性变化、随Rashba自旋轨道耦合强度的改变发生准周期变化,并且在2铁磁电极中磁矩取向平行时;选择适当的半导体的长度和Rashba自旋轨道耦合强度可以得到较大的自旋极化率.
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| 关 键 词： | 自旋极化输运 隧穿几率 自旋极化率 自旋轨道耦合 |
| 文章编号： | 1000-5854(2007)03-0341-04 |
| 修稿时间： | 2006-11-07 |
Spin-polarized Transport in Ferromagnetic/semiconductor/ferromagnetic Heterostructures |
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| ZHANG Hong-mei,LIU De.Spin-polarized Transport in Ferromagnetic/semiconductor/ferromagnetic Heterostructures[J].Journal of Hebei Normal University,2007,31(3):341-344. |
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| Authors: | ZHANG Hong-mei LIU De |
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| Institution: | 1. College of Sciences,Hebei University of Science and Technology,Hebei Shijiazhuang 050054 ,China; 2. College of Physics Science and Information Engineering,Hebei Normal University,Hebei Shijiazhuang 050016,China |
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| Abstract: | By using the coherent quantum transport theory and transfer matrix method,the transmission coefficient and spin polarization for polarized electrons with different spin orientations through ferromagnetic/semiconductor/ferromagnetic heterostructures have been investigated.The results indicate that the transmission coefficient and spin polarization are periodic function of length of the semiconductor,quasi-periodic function of Rashba spin-orbit effect.A moderate length of the semiconductor and Rashba spin-orbit effect allow a giant spin polarization with parallel magnetization. |
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| Keywords: | spin-polarized transport transmission coefficient spin polarization spin-orbit effect |
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