Figure 3
From: Stanene cyanide: a novel candidate of Quantum Spin Hall insulator at high temperature
(a) Topological phase diagram of SnCN as a function of strains. The metal-NI (Normal insulator) and NI-TI (Topological insulater) transition occur at −18% and −2% of the strainless lattice constant, respectively. Red/blue half dots denote fundamental/inverted gap. Brown dots show the relative energy of structures under different strains. (b) Orbital-resolved band structure under different strains. Red/blue dots denote s/
dominated orbitals. The size of dot denotes the weight of projection. (c) The energy gap as a function of extra vertical electric field. (d) Spin texture of the highest valence band of SnCN under electric field of 0.5 V/Å. Arrows refer to the in-plane orientation of spin and the color background denotes z component of spin. (e) Spin-resolved band structure of SnCN under electric field of 0.5 V/Å. Red/blue lines denote bands with spin up/down polarization.
