Biography
Dr. Changjin Zhang
Dr. Changjin Zhang
High Magnetic Field Laboratory, Chinese Academy of Sciences, China
Title: Novel quantum phenomena of topological superconductor SrxBi2Se3
Abstract: 
Topological superconductivity is attracting tremendous research interest in condensed matter physics and materials societies recently. In this talk, I will first introduce the discovery of superconductivity by intercalation of alkaline earth metal Sr into the prototype topological insulator Bi2Se3. The topological surface state in SrxBi2Se3 is confirmed by the high magnetic field Shubnikov-de Hass oscillation date. We observe the second superconducting phase of SrxBi2Se3 under high pressure. And by a scanning tunneling spectroscopy analysis we find that the surface Dirac electrons are driven into Cooper pairs as the SrxBi2Se3 is transition from normal state into superconducting state. Finally I will briefly discuss the planar Hall effect and giant anisotropic magnetoresistance found in this compound.
Biography: 
Dr. Changjin Zhang obtained his bachelor’s degree (1998) and PhD degree (2003) from University of Science and Technology of China. Then he worked as a postdoctoral research fellow in Seoul National University and National Institute of Advanced Industrial Science and Technology in Japan from 2003 to 2009. After that he joined the high Magnetic Field Laboratory of Chinese Academy of Science in 2009. He was awarded the “Hundred Talents” winner of Chinese Academy of Sciences in 2010. From 2017, Dr. Zhang serves as the chief scientist of the National Key R&D Program of China. Dr. Zhang’s research interest includes high temperature superconductivity, topological quantum materials, two dimensional semiconductors, as well as other novel quantum phenomena under high magnetic field.