Since the discovery of topological insulators, the topological characteristics of the electron bands in solid state becomes one of the center topics of current condensed matter physics and material science. Here I will talk about the superconductivity and the extremely large magnetoresistance on three related topological materials. Superconductivity in noncentrosymmetric half-heusler compound YPtBi is found to exhibit interesting pairing mechanism beyond spin triplet. Another half-heusler compound LuAuSn is found to exhibit very large magnetoresistance and superconductivity. In another topological semimetal NbSb2, large transverse magnetoreistance (the magnetoresistant ratio ~ 1.3 × 105% in 2 K and 9 T field, and 4.3 × 106% in 0.4 K and 32 T field, without saturation) and field-induced metal-semiconductor-like crossover is reported.
Dr. Kefeng Wang received his Ph.D. in Condensed Matter Physics from Nanjing University and then worked at Nanjing University, Brookhaven National Laboratory, and University of Maryland, College Park as a postdoctoral researcher/scientist. His research interests focuses on the exploratory synthesis and physical properties characterization of new quantum materials in extreme conditions, and covers the unconventional superconductivity, heavy fermion materials, topological materials and multiferroics. Dr. Wang has published over 30 articles in prestigious journals including Advances in Physics, Scientific Reports, Physical Review X, Physical Review Letters, Physical Review B and Applied Physics Letters, etc.