学术报告（9月27日）

主持人：姚道新教授

欢迎广大师生参加！

摘要： 

The perovskite superconductor Sr2RuO4 is a promising candidate platform for quantum computing. There have been substantial experimental support for its putative topological chiral p-wave order, with a notorious exception that the spontaneous current expected at the edges of this superconductor has not been detected. In this talk I will present a general theory of the edge currents in chiral superconductors. It will be shown that the edge current may vanish for chiral superconductors with higher angular momentum Cooper pairing, i.e. d-, f-wave etc; and that it may be significantly smaller for anisotropic chiral p-wave states. The relevance of these results to Sr2RuO4 will be examined in detail. I will also briefly discuss the orbital angular momentum problem in topological chiral superfluids, such as the Helium-3 A-phase which also exhibits chiral p-wave order. 

References: W.Huang, E. Taylor, C. Kallin, Phys. Rev. B 90, 224519 (2014); Y. Tada, W. Nie, M. Oshikawa, Phys. Rev. Lett. 114, 195301 (2015).