Gate-tunable valley-spin filtering in silicene with magnetic barrier

Gate-tunable valley-spin filtering in silicene with magnetic barrier
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具有磁势垒的硅烯中的栅极可调谷自旋滤波

DOI:
10.1063/1.4921799
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发表时间:
2015-05
影响因子:
3.2
通讯作者:
H. Meng
H. Meng
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
X. Q. Wu;H. Meng

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本文利用狄拉克方程的模式匹配方法,理论研究了单层厚硅烯中谷分辨和自旋分辨的磁势垒散射。我们表明,自旋谷滤波效果可以实现,也可以完全通过顶部和底部的门调谐。此外,当反转交错势的符号时,我们发现谷极化的方向发生了转变,而自旋极化的方向不变。这些结果可为硅烯基谷阀的设计提供有意义的信息。
We theoretically study the valley- and spin-resolved scattering through magnetic barrier in a one layer thick silicene, using the mode-matching method for the Dirac equation. We show that the spin-valley filtering effect can be achieved and can also be tuned completely through both a top and bottom gate. Moreover, when reversing the sign of the staggered potential, we find the direction of the valley polarization is switched while the direction of spin polarization is unchanged. These results can provide some meaningful information to design valley valve residing on silicene.
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