F. Rebentrost et M. Kuchler, NONLINEAR ELECTRONIC RESPONSE AND SHG FROM ADSORBATES ON SIMPLE METAL-SURFACES, Applied physics A: Materials science & processing, 60(2), 1995, pp. 127-130
For the chemisorption model of Lang and Williams, the adsorbate-induce
d electron density changes in linear and nonlinear order of the field
were calculated recently. Based on these calculations the relation bet
ween the electronic structure of simple atom/metal systems and the pro
cess of SHG from surfaces is discussed in terms of relevant factors su
ch as electronegativity, nonlinear atomic polarizability, work-functio
n change, and metal response.