Anharmonic surface vibrations in photoemission from alkali metals
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
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.
- OSTI ID:
- 5428440
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 49:3; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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