Figure 2
From: Atomic and electronic structure of an alloyed topological insulator, Bi1.5Sb0.5Te1.7Se1.3
STM topographs.
(a) and (b), STM topographs on a flat area where the step edges and atomic lattices were visible. In the inset of (a), a cross section of the topograph along the blue line marked ‘A’ is plotted. For (a), the scan size was 250 nm × 250 nm with a bias voltage, VB = 0.5 V and a set point current, I = 1 nA. For (b), the scan size was 10 nm × 10 nm with VB = −0.4 V and I = 0.2 nA.
