Generation of Pure Bulk Valley Current in Graphene
Generation of Pure Bulk Valley Current in Graphene
复制标题
石墨烯中纯体谷电流的产生
DOI：
10.1103/physrevlett.110.046601
复制
发表时间：
2013-01-23
影响因子：
8.6
通讯作者：
Guinea, Francisco
中科院分区：
文献类型：
--
作者：
Jiang, Yongjin;Low, Tony;Guinea, Francisco
谷电流的产生是石墨烯谷电子学中的基本目标，但其实现的实际方法还不为人所知。我们提出了一个可行的方案，通过绝热循环变形的应变和化学势在悬浮区的石墨烯机械谐振器中的体谷电流的产生。伴随的应变规范场可以打破空间镜像对称的问题内的两个不等价的谷，导致一个有限的谷电流由于量子泵浦。设计了一种全电测量结构，用纯体谷电流检测新态。DOI：10.1103/PhysRevLett.110.046601
The generation of valley current is a fundamental goal in graphene valleytronics but no practical ways of its realization are known yet. We propose a workable scheme for the generation of bulk valley current in a graphene mechanical resonator through adiabatic cyclic deformations of the strains and a chemical potential in the suspended region. The accompanied strain gauge fields can break the spatial mirror symmetry of the problem within each of the two inequivalent valleys, leading to a finite valley current due to quantum pumping. An all-electrical measurement configuration is designed to detect the novel state with pure bulk valley currents. DOI: 10.1103/PhysRevLett.110.046601