物理学进展2025，Vol.45Issue(5)：250-259,10.DOI:10.13725/j.cnki.pip.2025.04.003
多轨道超导体中自旋轨道耦合导致的偶然零模
Accidental zero modes in a multiorbital superconductor with spin-orbital coupling
向柯 1王达 2王强华2
作者信息
- 1. 南京大学物理学院,固体微结构物理国家重点实验室,南京 210093
- 2. 南京大学物理学院,固体微结构物理国家重点实验室,南京 210093||南京大学人工微结构科学与技术协同创新中心,南京 210093
- 折叠
摘要
Abstract
The Majorana zero modes in vortex cores are of extensive interest in the context of topological quantum computing.However,a zero-energy bound state may arise accidentally but is not necessarily a Majorana zero mode.Such accidental zero modes should be carefully ruled out in experiment in order to identify the genuine Majorana zero modes.We show that in a spin-orbital coupled multi-band superconductor,such as the iron-selenide superconductor,accidental zero modes indeed arise in the vortex core if the pairing symmetry is the so-called nodeless d-wave(defined in the absence of spin-orbital coupling).Instead,if the pairing sym-metry is s++or s+-with respect to the Fermi pockets split by the spin-orbital coupling,the accidental zero modes do not appear in the limit of weak spin-orbital coupling.Our results are not only important in the experimental identification of Majorana zero modes,but also provide an avenue to pinpoint the pairing symmetry of the iron-selenide superconductor.关键词
自旋轨道耦合/安德烈夫近似/偶然零模Key words
spin-orbital coupling/Andreev approximation/accidental zero mode分类
数理科学引用本文复制引用
向柯,王达,王强华..多轨道超导体中自旋轨道耦合导致的偶然零模[J].物理学进展,2025,45(5):250-259,10.
