Effects of isotope disorder on phonons in germanium determined from bound exciton luminescence

G. Davies, J. Hartung, V. Ozhogin, K. Itoh, W. L. Hansen, E. E. Haller

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The effects of isotope disorder on the energies of the transverse acoustic (TAL), longitudinal acoustic (LAL) and transverse optical (TOL) phonons at the L point have been investigated using the luminescence of excitons bound to copper acceptors. In a sample with approximately equal 70Ge and 78Ge the TOL phonon is 0.14+or-0.03 meV higher in energy than expected for a crystal of the same mean atomic mass, while the LAL phonon is 0.07+or-0.03 meV lower in energy; the TOL phonon is also broadened by 0.4 meV. In this disordered sample the Cu no-phonon line is 0.05+or-0.02 meV higher than expected.

Original languageEnglish
Article number021
Pages (from-to)127-130
Number of pages4
JournalSemiconductor Science and Technology
Volume8
Issue number1
DOIs
Publication statusPublished - 1993 Dec 1
Externally publishedYes

ASJC Scopus subject areas

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

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