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

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

2008-06-14

arxiv.org/abs/0806.2364v1

Phys. Stat. Sol. (a) 205, 1307 (2008)

Physics

Condensed Matter

Materials Science

9 pages, 2 figures

Scientific paper

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 {\it map} the electron-hole excitation spectrum of the quasi two-dimensional Shockley surface state band that is present on the Be(0001) surface.

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