Non-Hermitian Kitaev chain with complex periodic and quasiperiodic potentials

• 作者: Xiang-Ping Jiang Yi Qiao Junpeng Cao
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 499-504
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abfa08

摘要

We study the topological properties of the one-dimensional non-Hermitian Kitaev model with complex either periodic or quasiperiodic potentials.We obtain the energy spectrum and the phase diagrams of the system by using the transfer matrix method as well as the topological invariant.The phase transition points are given analytically.The Majorana zero modes in the topological nontrivial regimes are obtained.Focusing on the quasiperiodic potential,we obtain the phase transition from the topological superconducting phase to the Anderson localization,which is accompanied with the Anderson localization-delocalization transition in this non-Hermitian system.We also find that the topological regime can be reduced by increasing the non-Hermiticity.