Experimental observation of Dirac-like surface states and topological phase transition in Pb${}_{1-x}$Sn${}_x$Te(111) films

Chenhui Yan, Junwei Liu, Yunyi Zang +12

The surface of a topological crystalline insulator (TCI) carries an even number of Dirac cones protected by crystalline symmetry. We epitaxially grew high quality Pb${}_{1-x}$Sn${}_x$T…