Figure 2: Basic properties of Tl/Si(111)-(1 × 1).
From: Valley spin polarization by using the extraordinary Rashba effect on silicon
(a) Atomic structure of the system. Red and green circles represent the Tl and Si atoms, respectively, and the blue arrows indicate the mirror planes. (b) The SBZ of Tl/Si(111)-(1 × 1). The symmetry points 
and 
are indicated by dark-blue and light-blue circles. (c) Energy-band dispersions obtained by a relativistic first-principles band calculation. Red and blue lines are spin-polarized surface states.
