Fig. 3
From: Spin Orbit Coupling Gap and Indirect Gap in Strain-Tuned Topological Insulator-Antimonene
Band structures before (left) and after (right) the band inversion. Positive strain indicates expansion and negative strain indicates compression. All energies are referenced to Fermi level. The dashed lines are merely a guide for viewing the energy shifts of each band. The signs (+, −) (associate with band 1, 3) indicate the parities of the wavefunctions of Γ point states. The band structures show that, when considering SOC, antimonene can remain in insulator phase after the band inversion