Topological  superconductors are renowned for hosting a special kind of  quasiparticles, the Majorana modes, whose antiparticles are themselves.  Unconventional superconductors, such as $p$- and $d$-wave  superconductors, serve as important platforms for realizing topological  superconductivity However, such unconventional superconductors are quite  rare in nature. Thus, further exploration for TSCs is necessary.

In  the pursuit of TSCs, two key challenges need to be addressed: first,  identifying effective platforms for realizing TSCs, and second,  developing efficient methods for diagnosing TSCs. In this presentation,  we offer solutions to both challenges. We introduce a novel approach to  realizing TSCs by combining the most common BCS pairing in nature with  band degeneracy, which is fundamentally different from the previous  method that utilized TI surface states. Additionally, we propose a  diagnostic method specifically designed for the most common A1g pairing  symmetry in nature. It is important to note that under this symmetry  setting, previous symmetry indicator method is silent, although many  topological phases exist from a classification perspective.

Biography

Dr. Zhongyi Zhang received his Ph.D. from the Institute of Physics, Chinese  Academy of Sciences, in 2023, and then worked as a Post-doctoral Fellow  at the Hong Kong University of Science and Technology. His research  centers on the theoretical study of condensed matter physics, with a  particular emphasis on the full classification, topological, magnetic,  and superconducting properties of exotic quantum systems.

Inviter

Xian-Xin Wu