Spin-flip Raman-scattering studies of compensating donor centers in nitrogen-doped zinc selenide grown by molecular-beam epitaxy

C. M. Townsley, J. J. Davies, D. Wolverson, P. J. Boyce, G. Horsburgh, T. A. Steele, K. A. Prior, B. C. Cavenett

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

When ZnSe is doped p type by the incorporation of nitrogen, a compensation process sets in for effective acceptor concentrations between 1017 and 1018 cm-3. It is generally agreed that this is due to the creation of compensating donors which have been reported to lie at a depth of about 45 meV. It has previously been shown from optically detected magnetic resonance and spin-flip Raman-scattering experiments that these donors have a gyromagnetic ratio (g value) of about 1.4, compared with the g value of 1.1 for the more usual shallow donors (which lie at about 26 meV). We report here a systematic study of a series of ZnSe layers (grown by molecular-beam epitaxy) in which the nitrogen concentration is gradually increased, and we confirm the correlation between the onset of the compensation (at an effective acceptor concentration of about 1.7×1017 cm-3) and the appearance of the 45-meV donor. The spin-flip Raman scattering is a resonance process that requires the laser energy to coincide with the excitonic transition associated with the donor, and we have exploited this effect to determine the difference in the localization energies of excitons bound at the two types of donor. The results show that Haynes's rule is obeyed for donor depths ED extending at least to 45 meV, the exciton localization energy being 0.20ED.

Original languageEnglish
Pages (from-to)10983-10987
Number of pages5
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume53
Issue number16
Publication statusPublished - 15 Apr 1996

Fingerprint Dive into the research topics of 'Spin-flip Raman-scattering studies of compensating donor centers in nitrogen-doped zinc selenide grown by molecular-beam epitaxy'. Together they form a unique fingerprint.

  • Cite this

    Townsley, C. M., Davies, J. J., Wolverson, D., Boyce, P. J., Horsburgh, G., Steele, T. A., Prior, K. A., & Cavenett, B. C. (1996). Spin-flip Raman-scattering studies of compensating donor centers in nitrogen-doped zinc selenide grown by molecular-beam epitaxy. Physical Review B: Condensed Matter and Materials Physics, 53(16), 10983-10987.