Fig. 1: Topological insulator properties of Bi2Te3.
From: Infrared dielectric metamaterials from high refractive index chalcogenides
a Crystal structure of rhombohedral-phase Bi2Te3. b Band structure of Bi2Te3 bulk (top panel) and slab (bottom panel) calculated at the LDA level, with (red lines) and without (blue lines) spin–orbit coupling. Including the latter leads to band-inversion at the Γ point and gives rise to topologically protected states at the surface (bottom panel). Inset of the bottom panel shows Brillouin zone of the crystal indicating the main symmetry points.
