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arXiv 0905.1496cond-mat.mes-hall
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磁共振隧穿二极管中自旋隧穿时间的量子尺寸效应

Quantum size effects on spin-tunneling time in a magnetic resonant tunneling diode

Alireza Saffarzadeh, Reza Daqiq

摘要:

从理论上研究了(Zn,Mn)Se稀磁半导体层磁共振隧穿二极管(RTD)的量子尺寸效应对电子自旋隧穿时间和自旋极化的影响。结果表明,自旋隧穿时间可能会发生振荡,并且自旋方向相反的电子的隧穿时间会因系统参数的不同而有很大的差异。我们还研究了结构不对称性的影响,这是有关的厚度的差异的双折射层。研究发现,结构的不对称性对电子隧穿磁性RTD的时间和自旋极化有很大的影响。结果表明,通过选择合适的层厚,可以设计出高速、理想的自旋滤波二极管。

英文摘要:

We study theoretically the quantum size effects of a magnetic resonant tunneling diode (RTD) with a (Zn,Mn)Se dilute magnetic semiconductor layer on the spin-tunneling time and the spin polarization of the electrons. The results show that the spin-tunneling times may oscillate and a great difference between the tunneling time of the electrons with opposite spin directions can be obtained depending on the system parameters. We also study the effect of structural asymmetry which is related to the difference in the thickness of the nonmagnetic layers. It is found that the structural asymmetry can greatly affect the traversal time and the spin polarization of the electrons tunneling through the magnetic RTD. The results indicate that, by choosing suitable values for the thickness of the layers, one can design a high speed and perfect spin-filter diode.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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