supported by Natural Science Foundation of China(No.61290305,11374259,11374293 and 61474116);supported by the National Young 1000 Talents Plan;funded by the US Department of Energy,under Contract No.DE-AC36-08GO28308.
Group-Ⅳ tellurides have exhibited exotic band structures.Specifically,despite the fact that Sn sits between Ge and Pb in the same column of the periodic table,cubic SnTe is a topological crystalline insulator with ba...