All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Physical Review Letters

Volume

67

Issue

1

Publication Date

7-1-1991

First Page

116

Last Page

119

DOI

10.1103/PhysRevLett.67.116

Abstract

High-resolution temperature-dependent photoemission data from Na 2p core levels reveal substantially larger phonon broadening in the first atomic layer of Na(110) than in the bulk. We show that the enhanced width is due primarily to the excitation of relatively soft phonon modes perpendicular to the surface. Soft surface-phonon modes also account for previously reported but uninterpreted broadening of transition-metal surface-atom core levels.

Comments

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