| 报告题目 | 2D topological superconductivity close to type-II van Hove singularity |
| 报告人 | Prof. Hong Yao |
| 报告人单位 | Tsinghua University |
| 报告时间 | 2013-05-13 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
We study 2D electronic systems whose Fermi surfaces have type-II van Hove saddle points, defined as saddle points residing at time-reversal-noninvariant momenta in Brillouin zone. We propose that triplet pairing is generically favored in such 2D systems with weak repulsive interactions. This is argued quite generally from a renormalization group treatment of these systems. Such triplet pairing could give rise to topological superconductivity such as chiral p+ip superconductivity with robust chiral Majorana fermions in system boundaries and non-Abelian Majorana fermions in vortex cores. Possible applications to the Bi-based superconductor LaOBiS2 will also be discussed. |
