Spin-Orbit Coupled s-Wave Superconductor in One-Dimensional Optical Lattice  

作　　者：杨丽君 郎利君 吕嵘 胡海平 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences [2]Department of Physics,Tsinghua University [3]Collaborative Innovation Center of Quantum Matter

出　　处：《Communications in Theoretical Physics》2015年第4期445-452,共8页理论物理通讯（英文版）

基　　金：Supported by National Program for Basic Research of MOST(973 grant);by National Natural Science Foundation of China under Grant Nos.11121063,11174360,11374354,11274195,2011CB606405 and 2013CB922000

摘　　要：We study the topological properties of spin-orbit coupled s-wave superconductor in one-dimensional optical lattice. Compared to its corresponding continuum model, the single particle spectrum is modified by the optical lattice and the topological phase which is characterized by the Majorana edge modes can survive in two regions of the singleparticle spectrum. With the help of the self-consistent Bogoliubov-de Gennes calculation in the harmonic trap, we find that the existence of an upper critical magnetic field removes the topological superconductor phase to the trap wings.We also study the effects of nonmagnetic and magnetic impurity on the topological properties, and find the universal behavior of the mid-gap state induced by impurity in the topological superconductor phase in strong scattering limit.

关 键 词：spin-orbit coupling Ma jorana fermions optical lattice 

分 类 号：O511.3[一般工业技术—材料科学与工程]