Anharmonic Surface Vibrations in Photoemission from Alkali Metals

Authors

G. K. Wertheim
D. Mark Riffe, Utah State UniversityFollow
P. H. Citrin

Document Type

Article

Journal/Book Title/Conference

Physical Review B

Volume

49

Issue

3

Publication Date

1-15-1994

First Page

2277

Last Page

2280

Abstract

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.

Comments

Published by American Physical Society in Physical Review B. Publisher PDF is available for download through link above.

Recommended Citation

"Anharmonic Surface Vibrations in Photoemission from Alkali Metals," G. K. Wertheim, D. M. Riffe, and P. H. Citrin, Phys. Rev. B 49, 2277 (1994).