Title

Band structure effects on the Be(0001) acoustic surface plasmon energy dispersion

Abstract

We report first-principles calculations of acoustic surface plasmons on the (0001) surface of Be, as obtained in the random-phase approximation of many-body theory. The energy dispersion of these collective excitations has been obtained along two symmetry directions. Our results show a considerable anisotropy of acoustic surface plasmons, and underline the capability of experimental measurements of these plasmons to map the electron-hole excitation spectrum of the quasi two-dimensional Shockley surface state band that is present on the Be(0001) surface. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Publication Date

5-9-2008

Journal Title

Physica Status Solidi A-Applications and Materials Science

Publisher

WILEY-V C H VERLAG GMBH

Digital Object Identifier (DOI)

10.1002/pssa.200778156

Document Type

Article

Rights

Copyright © 2008 WILEY-VCH Verlag