Electric field induced spin and valley polarization within a magnetically confined silicene channel
Electric field induced spin and valley polarization within a magnetically confined silicene channel
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DOI：
10.1063/1.4904751
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发表时间：
2014-12
影响因子：
3.2
通讯作者：
Liu Yiman;Xiaoying Zhou;Ma Zhou;Mengqiu Long;Guanghui Zhou
中科院分区：
文献类型：
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作者：
Liu Yiman;Xiaoying Zhou;Ma Zhou;Mengqiu Long;Guanghui Zhou
我们研究了Dirac电子沿着交换场通过硅烯片上铁磁体附近产生的通道的电子结构和输运性质。多重全内反射在沟道中诱导局域态，其行为类似于电子波导。一个效果的自旋和谷过滤起源于谷和自旋度之间的耦合预测这样的结构。有趣的是，通过同时局部施加电场和交换场，可以显著地调节该特征。得到了观察到完全自旋极化电流和谷极化电流的参数条件。这些发现可以在今天的实验技术中观察到，并对基于硅烯的自旋电子学和谷电子学应用有用。
We study the electronic structure and transport properties of Dirac electrons along a channel created by an exchange field through the proximity of ferromagnets on a silicene sheet. The multiple total internal reflection induces localized states in the channel, which behaves like an electron waveguide. An effect of spin- and valley-filtering originating from the coupling between valley and spin degrees is predicted for such a structure. Interestingly, this feature can be tuned significantly by locally applying electric and exchange fields simultaneously. The parameter condition for observing fully spin- and valley-polarized current is obtained. These findings may be observable in todays' experimental technique and useful for spintronic and valleytronic applications based on silicene.