Figure 5

(a) 255 × 255 nm² STM image of Sb(111), U_bias =  + 0.2 V, I_tun = 70 pA. (b) The corresponding cross-section of the STM image along the blue line in (a). (c) 120 × 120 nm² STM image of the Sb(111), U_bias =  + 0.6 V, I_tun = 300 pA. (d) The corresponding cross-section of the STM image along the blue line in (c). (e) 300 × 300 nm² STM image of the Sb(111) surface, U_bias =  + 0.3 V, I_tun = 100 pA. (f) The corresponding cross-section of the STM image along the blue line in (e). Bilayer (BL) and monolayer (ML) steps are indicated in the cross sections. All images were acquired at room temperature using the Pt-Ir tip.