Effective interaction between He atoms on a graphite surface

G. Vidali, M. W. Cole

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


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
Issue number10
StatePublished - 1980
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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