[1]洪盛熙,邓文基,刘军丰.类石墨烯材料中应力调制的量子泵浦效应[J].深圳大学学报理工版,2016,33(4):352-358.[doi:10.3724/SP.J.1249.2016.04352]
　Hong Shengxi,Deng Wenji,et al.Quantum pumping in strain modulated graphene-like materials[J].Journal of Shenzhen University Science and Engineering,2016,33(4):352-358.[doi:10.3724/SP.J.1249.2016.04352]
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类石墨烯材料中应力调制的量子泵浦效应()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第33卷
期数:
2016年第4期
页码:
352-358
栏目:
物理
出版日期:
2016-07-12

文章信息/Info

Title:
Quantum pumping in strain modulated graphene-like materials
文章编号:
201604003
作者:
洪盛熙1; 2; 邓文基1; 刘军丰2
1） 华南理工大学物理与光电学院，广东广州 510641
2）南方科技大学物理系，广东深圳 518055
Author(s):
Hong Shengxi1;  2;  Deng Wenji1;  and Liu Junfeng2
1) School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, Guangdong Province, P.R.China
2) Department of Physics, South University of Science and Technology of China, Shenzhen 518055, Guangdong Province, P.R.China
关键词:
凝聚态物理; 类石墨烯材料; 能谷流; 自旋流; 量子泵浦; 周期调制
Keywords:
condensed matter physics;  graphene-like material;  valley current;  spin current;  quantum pumping;  cyclic modulation
分类号:
O 469
DOI:
10.3724/SP.J.1249.2016.04352
文献标志码:
A
摘要:
通过对应力及电势垒的周期调制，在石墨烯及类石墨烯蜂窝格子材料中泵浦出能谷流.应力在能谷K和K′处诱导的符号相反的矢势，等效于加载K和K′能谷处的应力泵浦信号间有一个π相位差，导致纯能谷流的产生.当在含有自旋轨道耦合的类石墨烯蜂窝格子材料中存在一个交错子格子势时，经由自旋-能谷锁定相，泵浦出的纯能谷流可伴随着纯的自旋流.再引入一个交换场后，可通过泵浦得到电荷流、能谷极化流以及自旋极化流.
Abstract:
We propose a scheme for the pumping of bulk valley current in graphene and graphene-like honeycomb crystals by cyclic modulation of the strain and an electric potential barrier. The strain-induced opposite vector potentials at K and K′ valleys generate a π phase difference between the pumping signals of strain in two valleys, which leads to a pure valley current. In graphene-like honeycomb crystals with spin-orbit coupling, the pumped pure valley current can be accompanied by a pure spin current via the spin-valley locked phase in the presence of a staggered sublattice potential. The charge current, valley-polarized current, and spin-polarized current can also be pumped when an exchange field is applied.

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备注/Memo

备注/Memo:
Received：2016-05-18；Accepted：2016-05-24
Foundation：National Natural Science Foundation of China (11204187)
Corresponding author：Assistant Professor Liu Junfeng．E-mail: liujf@sustc.edu.cn
Citation：Hong Shengxi, Deng Wenji, Liu Junfeng．Quantum pumping in strain modulated graphene-like materials［J］. Journal of Shenzhen University Science and Engineering, 2016, 33(4): 352-358.（in Chinese）
基金项目：国家自然科学基金资助项目(11204187)
作者简介：洪盛熙(1990—)，男，华南理工大学硕士研究生．研究方向：介观系统的电子输运．E-mail：1228313900@qq.com
引文：洪盛熙，邓文基，刘军丰．类石墨烯材料中应力调制的量子泵浦效应［J］. 深圳大学学报理工版，2016，33(4)：352-358.
更新日期/Last Update: 2016-06-23