Sulfur isotope effects on the excitonic spectra of CdS

T. A. Meyer, M. L. W. Thewalt, M. Cardona, and R. Lauck
Phys. Rev. B 69, 115214 – Published 29 March 2004
PDFExport Citation

Abstract

The energies of bound excitons, as well as free excitons associated with the A, B, and C valence band edges, are compared using both photoluminescence spectroscopy and reflectivity spectroscopy for wurtzite CdS crystals containing natural Cd and S of either natural isotopic composition, or highly enriched 34S. In contrast to an earlier study of S isotope effects in CdS, all of the transitions, including the free exciton excited states, show nearly the same energy shifts, demonstrating that it is the isotope dependence of the band gap energy which is the dominant factor in these shifts, and not changes in the free exciton binding energies. The observed dependence of the band gap on the S mass is found to be in good agreement with earlier predictions based on the temperature dependence of the free exciton transition energies.

  • Received 14 November 2003

DOI:https://doi.org/10.1103/PhysRevB.69.115214

©2004 American Physical Society

Authors & Affiliations

T. A. Meyer and M. L. W. Thewalt

  • Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6

M. Cardona and R. Lauck

  • Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 69, Iss. 11 — 15 March 2004

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×