Figure 1: Structural model of the Sn/Si(111)(2✓3 × 2✓3)R30°-B interface based on the Tornevik model.
From: Hidden phase in a two-dimensional Sn layer stabilized by modulation hole doping
(a) Side view of the Si(111)(✓3 × ✓3)R30°-B substrate. The subsurface boron atoms at the S5 lattice location are coloured in pink. (b) Top view and side view of the Sn/Si(111)(2✓3 × 2✓3)R30°-B interface, according to ref. 16, but with the subsurface boron atoms included (pink). The Sn tetramer units are coloured dark blue. Note that there is no consensus in the literature regarding the structure of the Sn/Si(111)(2✓3 × 2✓3)R30°-B interface, and the model presented here serves only for illustrative purposes.
