Effective interaction between He atoms on a graphite surface

Gianfranco Vidali, M. W. Cole

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28 Scopus citations

Abstract

Evidence is presented to show that the two-dimensional effective interaction between He atoms on graphite is less attractive than the free-space interaction Vo. The principal origin of the effect is substrate screening of the attraction. A small shift arises also from averaging the adatom motion perpendicular to the surface. The revised potential Veff is shown to yield improved agreement for the specific heat in the low-coverage region where a quantum virial expansion applies.

Original languageEnglish (US)
Pages (from-to)4661-4665
Number of pages5
JournalPhysical Review B
Volume22
Issue number10
DOIs
StatePublished - 1980
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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