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Effect of various adsorbates in dephasing and population decay of the Cu(1 0 0) image potential states

โœ Scribed by A.G Borisov; J.P Gauyacq; A.K Kazansky

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
282 KB
Volume
540
Category
Article
ISSN
0039-6028

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โœฆ Synopsis

A theoretical study of the electron dynamics in image potential states on Cu(1 0 0) surfaces with different types of adsorbates is presented. Scattering of the image state electron by an adsorbate induces inter-band and intra-band transitions leading respectively to the population decay and to the dephasing of the image state. We compare results obtained with low coverage (typically 1 adsorbate atom per 1000 surface atoms) Cs, Ar, and a model electronegative adsorbates. As follows from our results, Cs adsorbates lead to both appreciable dephasing and decay, while electronegative adsorbates mostly affect the dephasing rate. The effect of low coverage Ar adsorbates is small, consistent with their neutrality.

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