Abstract
The contributions to the atomic desorption energy and activation energy for surface diffusion from electrostatic polarization forces and van der Waals dispersion forces for the deposition of gold on alkali halide substrates have been calculated assuming hard-sphere repulsion between adatom and ion. The results for different substrates are compared with each other and with experimental values for gold on ultrahigh-vacuum-cleaved NaF, NaCl, KCl and KBr surfaces. The magnitude of the polarization term is nearly equal to that of the van der Waals term and can be important in determining the adsorption site and diffusion path. This appears to be the case for NaF but not for NaCl.
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