The study of nonequilibrium longitudinal optical phonons in a high quality, single crystal wurtzite structure InN sample by using Raman spectroscopy was discussed. It was demonstrated that the band gap of InN cannot be around 1.89 eV, but were consistent with a band gap of about 0.8 eV. It was shown that the energetic electrons were capable of emitting five LO phonons during their thermalization to the bottom of the conduction band. A range of LO phonon wave vectors that electrons can emit exists because of the conservation of both energy and momentum for the electron-LO phonon interaction process.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)