Strain-Induced Localization and Electronically Stimulated Desorption and Dissociation

Abstract

The small-polaron-like "self-trapping" of a surface electronic excitation plays a central role in electronically stimulated desorption. Two types of desorption, immediate and delayed, are possible. Calculations for hydrogen on silicon surfaces indicates that two-hole excitations produce immediate desorption for ${\mathrm{H}}^{+}$ while single holes may produce delayed desorption of neutral H.