E.A. Stachf, R. Hull, et al.
Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Paper
Structure of the Si(111)-CaF2 interface
Abstract
The structure of the Si(111)-CaF2 interface has been determined with medium-energy ion scattering. Ca bonds to the Si substrate in a geometric arrangement virtually identical to CaSi2. Half of the F atoms at the interface are missing; there is no F-Si bonding and the interface is charge neutral. The structure we find has not been considered previously and provides a natural explanation for the results of published photoemission studies. © 1988 The American Physical Society.