The dispersion interaction between a He atom and a solid has the form V ∼ -C3z-3 at large distance. We calculate the value of C3 for several cases (Ge, Si, GaAs, and diamond) using experimental results for ∈2(ω). The model dielectric function of Breckenridge, Shaw and Sher is found to yield good agreement with the value of C3 obtained from experimental data.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces