Non-equilibrium electron distributions and electron-longitudinal optical phonon scattering rates in wurtzite GaN

Kong-Thon Tsen, D. K. Ferry, A. Botchkarev, B. Sverdlov, A. Salvador, H. Morkoç

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Non-equilibrium electron distributions and electron-longitudinal optical phonon scattering rates in wurtzite GaN have been studied by subpicosecond time-resolved Raman spectroscopy. Our experimental results show that for electron densities n ≥ 5 × 1017cm-3, the non-equilibrium electron distributions in wurtzite GaN can be very well described by Fermi-Dirac distribution functions with the effective electron temperature much higher than the lattice temperature. In addition, we find that the total electron-longitudinal optical phonon scattering rate in GaN is about one order of magnitude larger than that in GaAs. We attribute this enormous increase in the electron-longitudinal optical phonon scattering rate to the much larger ionicity in GaN.

Original languageEnglish (US)
Pages (from-to)171-174
Number of pages4
JournalJournal of Electronic Materials
Volume27
Issue number4
DOIs
StatePublished - Apr 1998

Keywords

  • GaN
  • Phonon
  • Raman

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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