Crystal structure of the topological insulator bismuth selenide

Crystal structure of the topological insulator bismuth selenide

crystal structure of the topological insulator bismuth selenide

This illustration shows the crystal structure of the topological insulator bismuth selenide, Se-Bi-Se-Bi-Se, consisting of five atomic layers ("quinlayers") of alternating selenide (Se) and bismuth (Bi). 

Image: Penn State