A theory is presented for the second term of the series representing the asymptotic atom-surface interaction: V(z) ∼ - C3(z - z0)-3 - C5(z - z0)-5... The expression for C5 is analogous to that for C3, with the quadrupole polarizability y replacing the dipole polarizability α. Numerical results are obtained for H, Na, Cs and noble gas atoms interacting with the surfaces of noble metals, Al, LiF, graphite and MgO. In general, C5 C3 is of order γ0 α0, i.e., the ratio of static adatom polarizabilities. Examples are presented to show that the calculated term involving C5 should be included in the vicinity of the potential minimum.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry