Ideal topological crystalline insulators and topological superconductors in the Pb-Sn-In-Te

Genda Gu, PhD
Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, NY 11973
April 14, 2017 – PSB 160/161, 1:30-2:30pm

Abstract: The discovery of 3D topological insulator materials and topological superconductor open up a new research field in the condensed matter physics.  In order to search for the ideal topological insulator, topological crystalline insulator and topological superconductor, we have grown a large number of the single crystals of  Pb-system ( Pb-Sn-In-Te) topological crystalline insulator and their topological superconductor.  We have measured the physical properties on these single crystals by various techniques. We have studied the effect of crystal growth condition, impurity and composition on the bulk electrical conductivity of these single crystals. We try to find out which composition and crystal growth condition is the best for the ideal topological insulator,  topological crystalline insulator and topological superconductor.  We have got the bulk topological superconductor with Tc=5K.

Genda Gu has completed his Ph.D. in 1989 from Harbin Institute of Technology, China. He is the Senior Physicist in Brookhaven National Laboratory and the adjunct professor at Stony Brook University. his research interest includes the discovery and development of new superconducting and strongly correlated electrons materials, with particular focus on the growth of high quality single crystals and the investigation of the physical properties of those materials. He is Fellow of the American Physical Society.  He has published more than 300 papers in reputed journals.