Electron-phonon interaction and structural instability of mixed valence compounds Cs2Au2X6 (X = Cl, Br, I)

M. Shirai, A. Saito

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1 Citation (Scopus)

Abstract

The electron-phonon interaction of mixed valence compounds Cs2Au2X6 (X = Cl, Br, I) is studied microscopically on the basis of the realistic electronic band structure in their ideal cubic phase. The electron-phonon interaction between the conduction-band states near the Fermi level is especially strong for the stretching-type displacements of halogen atoms, which correspond to the Eg phonon mode at q = (π/a,π/a,π/a). The tetragonal distortion observed in Cs2Au2X6 is originated from the characteristic dependences of the electron-phonon interaction on wavevectors and vibrational modes as well as the nesting features of the Fermi surface.

Original languageEnglish
Pages (from-to)2043-2044
Number of pages2
JournalSynthetic Metals
Volume71
Issue number1-3
DOIs
Publication statusPublished - 1995 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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