Klein Paradox and Disorder-Induced Delocalization of Dirac Quasiparticles in One-Dimensional Systems  

作　　者：袁建辉 成泽 尹淼 曾其军 张俊佩 

机构地区：[1]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Communications in Theoretical Physics》2010年第12期1129-1133,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos. 10174024 and 10474025

摘　　要：Dirac particle penetration is studied theoretically with Dirac equation in one-dimensional systems. We investigate a one-dimensional system with N barriers where both barrier height and well width are constants randomly distributed in certain range. The one-parameter scaling theory for nonrelatiyistic particles is still valid for massive Dirac particles. In the same disorder sample, we find that the localization length of relativistic particles is always larger than that of nonrelativistic particles and the transmission coefficient related to incident particle in both cases fits the form T～ exp（-αL）. More interesting, massless relativistic particles are entirely delocalized no matter how big the energy of incident particles is.

关 键 词：Anderson localization disordered structures quantum transport localized states 

分 类 号：O412.1[理学—理论物理]