Observation of the surface hybridization gap in the electrical transport properties of the ultrathin topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$

Feike van Veen, Sofie Kölling, Stijn R. de Wit +4

We study the three-dimensional topological insulator (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$ in its ultrathin limit i.e. when the thickness is of the same order as the surface state pen…