Effect of high hydrostatic pressure on small oxygen-related clusters in silicon: LVM studies

Research output: Contribution to journalArticle

Abstract

Local vibrational mode (LVM) spectroscopy is used to explore the effect of high hydrostatic pressure (HP) on the formation of small oxygen-related clusters (dimers, trimers, thermal donors, and C-O complexes) at 450degreesC and 650degreesC in Cz-Si crystals with different impurity content and prehistory. It is found, in agreement with previous studies, that HP enhances the oxygen clustering in Cz-Si at elevated temperatures. The effect of HP is related mainly to enhancement in the diffusivity of single oxygen atoms and small oxygen aggregates. HP does not noticeably increase the binding energies of the most simple oxygen related complexes like O-2i, CsOm. The biggest HP effect on the thermal double donor (TDDs) generation is revealed in hydrogenated samples. Heat-treatment of such samples at 450degreesC under HP results in extremely high TDD introduction rates as well as in a strong increase in the concentration of the first TDD species. (C) 2003 Elsevier B.V. All rights reserved.

Details

Authors
  • LI Murin
  • Lennart Lindström
  • A Misiuk
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics

Keywords

  • pressure, silicon, oxygen clustering, LVMs
Original languageEnglish
Pages (from-to)565-569
JournalPhysica B: Condensed Matter
Volume340
Publication statusPublished - 2003
Publication categoryResearch
Peer-reviewedYes