Fig. 2
From: Quasi-two-dimensional superconductivity from dimerization of atomically ordered AuTe2Se4/3 cubes
Crystal structure and electron density difference of AuTe2Se4/3. a The structure of single block of atomically ordered Au–Te–Se. b The stereotype structure of the ab-plane with two kinds of Te–Te bond lengths of 3.18 and 3.28 Å. c The strips of front/back face of cubic arrays. The violet dash lines denote the Te–Te bonds of neighbor cubes along the a-axis. d The calculated EDD of front/back face, which is calculated by subtracting free atom electron density from the total electron density. The plus and minus scale represent the accumulated and depleted electrons. e The strips of middle layer of cubic arrays. The two violet and one blue dash lines denote the Te–Te bonds of neighbor cubes. f The corresponding EDD images of middle layer. g The whole crystal structure of AuTe2Se4/3. The dash lines represent the triclinic unit cell (P−1)
