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dc.contributor.advisor Dunning, F. B.
dc.creatorButler, William Hollis
dc.date.accessioned 2009-06-04T00:07:43Z
dc.date.available 2009-06-04T00:07:43Z
dc.date.issued 1991
dc.identifier.citation Butler, William Hollis. "Spin-polarized metastable de-excitation spectroscopy: A new probe of alkali chemisorption on surfaces." (1991) Diss., Rice University. https://hdl.handle.net/1911/16423.
dc.identifier.urihttps://hdl.handle.net/1911/16423
dc.description.abstract Metastable (Atom) De-excitation Spectroscopy (MDS) provides a powerful technique with which to investigate surface electronic structure with extreme surface specificity. In this technique a thermal energy beam of noble-gas metastable atoms is directed at the surface under study and the kinetic energy distribution of ejected electrons that result from metastable atom de-excitation is measured. Although the measured distribution contains information about the electronic structure of the outermost surface layer, its detailed analysis requires knowledge of the dynamics of the metastable atom-surface interaction. In the present work, these dynamics have been investigated directly by use of spin-labeling techniques. The electron spins of the incident metastable atoms are polarized and the spin-polarization of the ejected electrons is measured with a Mott polarimeter. Energy resolve electron spin-polarization measurements are reported for a variety of sub-monolayer coverages of cesium on a Cu(100) surface, and for oxygen and cesium co-adsorption on a Cu(100) surface. The Cs/Cu(100) system exhibits large ($\sim$2.8 eV) change in the surface work function. The results of the current work suggest that MDS interactions in both high and low work function regimes are more complex than has previously been supposed. Several additional interactions are suggested to explain the data acquired. The question of the occupancy of the adsorbed cesium valence level at various coverages is also addressed.
dc.format.extent 63 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectCondensed matter physics
dc.title Spin-polarized metastable de-excitation spectroscopy: A new probe of alkali chemisorption on surfaces
dc.type Thesis
dc.type.material Text
thesis.degree.department Physics
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy


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