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

被引:0
|
作者
周博臻 [1 ]
周斌 [1 ]
机构
[1] Department of Physics, Hubei University
基金
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词
Majorana zero modes; topological class; topological phase transition;
D O I
暂无
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We investigate the topological properties of a ladder model of the dimerized Kitaev superconductor chains.The topological class of the system is determined by the relative phase θ between the inter-and intra-chain superconducting pairing.One topological class is the class BDI characterized by the Z index,and the other is the class D characterized by the Z;index.For 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,respectively.In 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 observed.In the case of θ = π/2 it belongs to the class D.Our results show that for the given value of dimerization,the topologically nontrivial and trivial phases alternate with the variation of chemical potential.
引用
收藏
页码:378 / 385
页数:8
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