Anharmonic surface vibrations in photoemission from alkali metals
| Autor: | G. K. Wertheim, D. M. Riffe, P. H. Citrin |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Surface Vibrations
Materials science Phonon Physics Anharmonicity Alkali metal Alkali Metals Spectral line symbols.namesake Excited state Secondary emission Physics::Atomic and Molecular Clusters symbols Condensed Matter::Strongly Correlated Electrons Physics::Chemical Physics Atomic physics Photoemission Softening Anharmonic Debye |
| Zdroj: | All Physics Faculty Publications |
| ISSN: | 1095-3795 0163-1829 |
| Popis: | The phonon widths of outermost core-electron photoemission spectra from (110)-oriented overlayers of Na, K, and Rb metals show the expected Debye behavior for the bulk atoms, but significant deviations for the surface atoms. The data indicate a softening of the surface vibrational mode above 200 K. This effect, which is weak in Na but strong in K and Rb, demonstrates that the vibrational mode normal to the surface is anharmonic. |
| Databáze: | OpenAIRE |
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