Transition from surface vibrations to liquidlike dynamicsat an incompletely melted semiconductor surface

N. Takeuchi, A. Selloni, E. Tosatti

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We present results of a first-principles molecular-dynamics simulation of the vibrational spectrum of a model semiconductor surface where, close to the bulk melting temperature (Formula presented), the top bilayer becomes diffusive. The specific example chosen is Ge(111). In place of the ordinary surface vibrations, we obtain a spectrum more akin to that of a confined liquid. In particular, we predict a dramatic decrease in the intensity of high-frequency (bond-stretching) surface mode intensity, associated with a local melting-induced breaking of hard covalent bonds in the top bilayer.

Original languageEnglish (US)
Pages (from-to)15405-15407
Number of pages3
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number23
DOIs
StatePublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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