Do we know the true structure of Ge(111)c(2×8)?

Noboru Takeuchi, Annabella Selloni, E. Tosatti

Research output: Contribution to journalArticle

107 Scopus citations

Abstract

We present the first ab initio determination of the surface structure and electronic properties of Ge(111)c(2×8). New features emerge, in addition to the basic adatom rest-atom architecture. In agreement with LEED, which shows weak but nonvanishing quarter-order reflections, we find that an asymmetry is present in the surface unit cell, related to a small buckling between the two rest atoms, as well as to in-plane asymmetries of the rest atoms, adatoms, and first bilayer atoms. This inequivalance also produces a splitting of both the rest-atom and the adatom dangling-bond states, which explains the difference in their apparent heights as seen recently with scanning tunneling microscopy.

Original languageEnglish (US)
Pages (from-to)648-651
Number of pages4
JournalPhysical review letters
Volume69
Issue number4
DOIs
StatePublished - Jan 1 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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