Fig. 1: 1T/2H-TaS2 sample structure.
a 1500 nm × 700 nm section of a large area STM image showing a single layer step-edge. The upper and lower terraces correspond to the 1T and 2H polymorphic phases respectively. Image parameters: Vb = 300 mV, I = 100 pA b, Profile across the single layer step-edge shown in the STM image in (a) with an orange solid line. c STS spectrum measured on the 1T terrace showing the presence of the Lower and Upper Hubbard bands (LHB and UHB respectively). STS parameters: Vb = 400 mV, I = 500 pA, Vmod = 10 mV. d STS spectrum measured on the 2H terrace showing its metallic character. STS parameters: Vb = 400 mV, I = 500 pA, Vmod = 10 mV. All the measurements were performed at 52 K.
