Anomalous angle-dependent transport and superconducting properties in topological semimetal YPtBi

Half-Heusler RPtBi compounds (R=rare earth) are topological semimetals, some of which undergo a superconducting phase transition, and therefore they harbor topological surface states and Majorana surface fluid in the superconducting state. While recent ARPES measurements ubiquitously reported the existence of surface states in the RTBi systems, their evidence by other experimental techniques remains elusive. In this talk, we discuss magneto-transport properties in topological semimetal YPtBi as a function of an angle to shed light on the various surface states in both normal and superconducting states. We will also discuss the angle-dependent upper critical field determined by transport measurements in various rotation configurations.