Transient optical absorption by self-trapped holes in berillium oxide crystals

S. V. Gorbunov, S. V. Kudyakov, V. Yu Yakovlev, A. V. Kruzhalov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Transient optical absorption in berillium oxide crystals induced by an electron beam pulse has been studied by time-resolved absorption spectroscopy. The decay kinetics of this absorption reveals a component with a 6.5-ms time constant associated with the formation and decay of self-trapped holes. The absorption band of the self-trapped holes peaking at 3.6 eV and the UV absorption region of self-trapped excitons in BeO have been found to have similar properties. A model discussed is presenting the self-trapped hole as a small-radius polaron (of the O- ion-type) whose motion cannot be completely frozen out because of tunneling migration is discussed. At T> 100 K, thermally activated motion of self-trapped holes to electronic traps involving formation of self-trapped excitons is observed to occur.

Original languageEnglish
Pages (from-to)119-121
Number of pages3
JournalPhysics of the Solid State
Volume38
Issue number1
Publication statusPublished - Jan 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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