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Figure 1

From: Engineering Topological Surface States and Giant Rashba Spin Splitting in BiTeI/Bi2Te3 Heterostructures

Figure 1

(a) Crystal structure of the Bi3Te4I superlattice consisting of one QL of Bi2Te3 and one TL of BiTeI along the crystallographic c-axis. There are eight nonequivalent atoms in one unit cell with the stacking order of Bi1-I-Te1-Bi2-Te2-Bi3-Te3-Te4 from bottom to top, as labeled in the figure. (b) Hexagonal Brillouin zone with the high-symmetry points. The projected surface 2D Brillouin zones are also shown. (c) The calculated phonon spectrum of Bi3Te4I with SOC included.

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