Valley precession and valley polarization in graphene with inter-valley coupling
Valley precession and valley polarization in graphene with inter-valley coupling
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DOI：
10.1088/1361-648x/aa80cf
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
Qing-Ping Wu;Zhengfang Liu;Ai-xi Chen;Xianbo Xiao;Heng Zhang;G. Miao
中科院分区：
文献类型：
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作者：
Qing-Ping Wu;Zhengfang Liu;Ai-xi Chen;Xianbo Xiao;Heng Zhang;G. Miao
我们从理论上研究了谷间耦合作用下石墨烯中的谷旋进和谷极化。我们的研究结果表明，谷间耦合可以在石墨烯中诱导出谷极化，也可以在真实的空间中以类似于Rashba自旋-轨道相互作用旋转自旋的方式进动谷。此外，使用应变调制，我们可以实现高谷极化与大谷极化电流。这些发现提供了一种新的方法来创建和操纵石墨烯谷极化。
We theoretically investigate the valley precession and valley polarization in graphene under inter-valley coupling. Our results show that the inter-valley coupling can induce valley polarization in graphene and also precess valleys in real space in a manner similar to the Rashba spin–orbit interaction rotating spins. Moreover, using strain modulation, we can achieve high valley polarization with large valley-polarized currents. These findings provide a new way to create and manipulate valley polarization in graphene.