Topological phase transition in a ladder of the dimerized Kitaev superconductor chains

作     者：周博臻 周斌 

作者机构：Department of Physics Hubei University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2016年第25卷第10期

页      面：378-385页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.11274102) the Program for New Century Excellent Talents in University of Ministry of Education of China(Grant No.NCET-11-0960) the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20134208110001) 

主　　题：Majorana zero modes topological class topological phase transition 

摘      要：We investigate the topological properties of a ladder model of the dimerized Kitaev superconductor *** topological class of the system is determined by the relative phase θ between the inter-and intra-chain superconducting *** topological class is the class BDI characterized by the Z index,and the other is the class D characterized by the Z;*** the two different topological classes,the topological phase diagrams of the system are presented by calculating two different topological numbers,i.e.,the Z index winding number W and the Z;index Majorana number M,*** the case of θ=0,the topological class belongs to the class BDI,multiple topological phase transitions accompanying the variation of the number of Majorana zero modes are *** the case of θ = π/2 it belongs to the class *** results show that for the given value of dimerization,the topologically nontrivial and trivial phases alternate with the variation of chemical potential.