Valley transport driven by dynamic lattice distortion
Valley transport driven by dynamic lattice distortion
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DOI：
10.1103/physrevb.105.195409
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发表时间：
2021-10
影响因子：
3.7
通讯作者：
Yuya Ominato;D. Oue;M. Matsuo
中科院分区：
文献类型：
--
作者：
Yuya Ominato;D. Oue;M. Matsuo
从理论上研究了二维Dirac材料中机械转动与谷自由度之间的角动量转换。将k.p方法应用于二维Dirac材料，导出了动态晶格畸变的谷和涡之间的耦合。晶格应变效应也被纳入。谷转移和谷相关的载波定位预测使用动态晶格畸变。传输特性被发现是可控的，允许系统是绝缘的，并产生脉冲充电电流。我们的形式主义提供了一个途径，在二维狄拉克材料谷动力学的机械操纵。
Angular momentum conversion between mechanical rotation and the valley degree of freedom in 2D Dirac materials is investigated theoretically. Coupling between the valley and vorticity of dynamic lattice distortions is derived by applying the k.p method to 2D Dirac materials with an inertial effect. Lattice strain effects are also incorporated. Valley transfer and valley-dependent carrier localization are predicted using the dynamic lattice distortions. The transport properties are found to be controllable, allowing the system to be insulating and to generate pulsed charge current. Our formalism offers a route toward mechanical manipulation of valley dynamics in 2D Dirac materials.