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arXiv · 0806.2364

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

V. M. Silkin·J. M. Pitarke·E. V. Chulkov·B. Diaconescu·K. Pohl·L. Vattuone·L. Savio·Ph. Hoffmann·D. Farias·M. Rocca·P. M. Echenique
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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 {\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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V. M. Silkin, J. M. Pitarke, E. V. Chulkov, B. Diaconescu, K. Pohl, L. Vattuone, L. Savio, Ph. Hoffmann, D. Farias, M. Rocca, P. M. Echenique. 2008-06-14. Band structure effects on the Be(0001) acoustic-surface-plasmon energy dispersion. https://doi.org/10.1002/pssa.200778156

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