Surface dielectric response of uniaxial crystals: Application to graphite

V. U. Nazarov*, N. S. Karpinskaya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The model of a semi-infinite uniaxial crystal with a flat surface is reexamined. The surface-energy-loss function for uniaxial crystals, which generalizes the conventional expression Im-1/[1+(ω)], is derived. We demonstrate that in uniaxial crystals the three-dimensional charge-density oscillations can be excited by incident electrons, which do not penetrate into the bulk but are reflected at or above the surface plane. This effect is altogether due to the system anisotropy and it is inhibited in cubic crystals or homogeneous isotropic media. The implications of the theory are compared with the electron-energy-loss data for graphite.

Original languageAmerican English
Pages (from-to)11151-11155
Number of pages5
JournalPhysical Review B
Volume50
Issue number15
DOIs
StatePublished - 1994
Externally publishedYes

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