Figure 1
From: Large spin splitting of metallic surface-state bands at adsorbate-modified gold/silicon surfaces
Adsorbate-induced transformations in structural and electronic properties of Au/Si(111).
STM images and ARPES spectra taken in the first 
surface Brillouin zone (SBZ) along the 
direction from (a) pristine 
surface and the same surface after adsorption of 0.15 ± 0.05 ML of (b) Tl, (c) In and (d) Na. Scale of the STM images is 250 × 250 Å2, that of the insets is 50 × 50 Å2. Note that ARPES data are confined to the interior of SBZ as exact position of the 
point is at 0.546 Å−1. (e) Atomic arrangement (CHCT model) of the 
surface consisting of Au trimers (shown by orange circles) and Si trimers (shown by blue circles) residing on Si(111) bilayer (shown by black circles) and sketch of reciprocal space geometry with boundaries of the first 
SBZ given by black lines (dashed hexagon depicts the 1 × 1 SBZ). The high symmetry points are marked by circles.
