Valley-polarized edge pseudomagnetoplasmons in graphene: A two-component hydrodynamic model
Valley-polarized edge pseudomagnetoplasmons in graphene: A two-component hydrodynamic model
复制标题
石墨烯中的谷极化边缘赝磁等离激元：二元流体动力学模型
DOI：
10.1103/physrevb.97.115455
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发表时间：
2018
影响因子：
3.7
通讯作者：
Wei Jiang
中科院分区：
文献类型：
--
作者：
Ya Zhang;Bin Guo;Feng Zhai;Wei Jiang
利用非线性二分量流体动力学模型，研究了应变石墨烯片中电子的谷极化集体运动。在真实的空间中的自洽数值解表明存在谷极化边缘等离子体激元由于应变诱导的赝磁场。边缘伪磁等离子体激元的谷极化可以发生在特定的谷中，这取决于伪磁场和平衡的电子密度。对于几十特斯拉的伪磁场，在石墨烯片的边缘处实现了全谷极化，这是当前实验技术中的现实值。
By means of a nonlinear two-component hydrodynamic model, we study the valley-polarized collective motion of electrons in a strained graphene sheet. The self-consistent numerical solution in real space indicates the existence of valley-polarized edge plasmons due to a strain-induced pseudomagnetic field. The valley polarization of the edge pseudomagnetoplasmon can occur in a specific valley, depending on the pseudomagnetic field and the electron density in equilibrium. A full valley polarization is achieved at the edge of the graphene sheet for a pseudomagnetic field of tens of Tesla, which is a realistic value in current experimental technologies.