Vibrations of Bethe lattices with an icosahedral basis: Application to amorphous boron

K. Shirai, M. F. Thorpe, S. Gonda

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A model of an icosahedron-based random-network is constructed by using a Bethe lattice, and the vibrational spectrum has been calculated. Reasonable agreement with experimental spectra from amorphous boron is obtained. Comparison to the phonon spectra of crystalline boron with a similar structure shows the importance of the correlation in the phase of displacements between adjacent icosahedra. The even and odd vibrations have distinct frequencies in the crystal case. In a random network, the difference in the phase between intermolecular bonds is averaged, so that the highest frequency band becomes both IR and Raman active.

Original languageEnglish (US)
Pages (from-to)36-39
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume198-200
Issue numberPART 1
DOIs
StatePublished - May 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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