Electron Transport through Magnetic Superlattices with Asymmetric Double-Barrier Units in Graphene  

作　　者：HUO Qiu-Hong WANG Ru-Zhi YAN Hui 霍秋红;王如志;严辉(Laboratory of Thin Film Materials,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124)

机构地区：[1]Laboratory of Thin Film Materials,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124

出　　处：《Chinese Physics Letters》2012年第7期242-245,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 51032002,11074017 and 11174021;the IHLB under Grant No PHR 201007101;the Beijing Nova Program(No 2008B10);the Beijing Natural Science Foundation(No 1102006);the Basic Research Foundation of Beijing University of Technology.

摘　　要：We investigate the transport properties through magnetic superlattices with asymmetric double-barrier units in monolayer graphene.In N-periodic asymmetric double-barrier units,there is (N-1)-fold resonant peak splitting for transmission,but the splitting is (2N-1)-fold in N-periodic symmetric units.The transmission depends not only on the value of incident wavevectors but also on the value and the direction of transverse wavevectors.This renders the structure's efficient wavevector filters.In addition,the conductance of standard electrons with a parabolic energy spectrum is suppressed more strongly than that of Dirac electrons,whereas the resonances are more pronounced for Dirac electrons than for standard ones.

关 键 词：SPLITTING RENDER ELECTRON 

分 类 号：G63[文化科学—教育学]