Fig. 3
From: Observation of topologically protected states at crystalline phase boundaries in single-layer WSe2
STS characterization of single-layer mixed-phase WSe2. a STS spectra obtained in the 1T′ (orange) and 1H (blue) regions of single-layer WSe2 (f = 614 Hz, It = 0.3 nA, Vrms = 4 meV). The inset shows an STM image of coexisting 1T′ and 1H regions with a well-ordered interface between them (Vs = +500 mV, It = 0.1 nA). b Calculated LDOS(E) of bulk single-layer 1T′-WSe2 (black curve) compared to experimental STS spectrum (orange curve). c Close-up view of the boxed region in a shows low-energy experimental STS spectrum taken for 1T′-WSe2 phase. d Calculated LDOS(E) for 1T′-WSe2 over the same energy range as in c
