Fig. 1
From: Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2
Domain walls of 13-fold degenerate CDW reconstruction in 1T-TaS2. a Constant current STM image of the commensurate CDW with a schematic view of the David-star (orange lines) reconstruction (sample bias voltage Vs = −1.20 V, tunneling current It = 100 pA, and scan size L2 = 3.4 × 3.4 nm2). The violet spheres display the Ta atoms encapsulated by the S layers. The numbers in the CDW unit cell (a green parallelogram) indicate possible center positions of the 13-fold degenerate David stars. The indices are given by the conventional sequence19. Scale bar, 0.5 nm. b A STM image of the junction composed from domain walls (dashed lines) (Vs = −1.20 V, It = 100 pA, and L2 = 9.0 × 9.0 nm2). Scale bar, 2 nm. c dI/dV spectra acquired at the position marked by same colored dots in b. Each curves are equally shifted in intensity for clarity. d–g Spatial distributions of the domain wall and edge states at the energies given in the figures
