Host-isotope effect on the localized vibrational modes of oxygen dimer in isotopically enriched silicon

Daisuke Tsurumi, Kohei M. Itoh, Hiroshi Yamada-Kaneta

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


Local vibrational modes of oxygen dimers in silicon have been investigated using naturally available silicon (natSi) and isotopically enriched 29Si and 30Si crystals. Infrared absorption spectroscopy of natSi revealed two pairs of peaks originated from the oxygen dimers, a pair A at 1012 and 1060 cm-1 and a pair B at 1105 and 1136 cm-1, whose frequencies shifted when the mass of the silicon host atoms was changed. The observed frequency shifts of both A and B can be accounted for with a simple linear chain calculation assuming two previously proposed atomic configurations known as staggered and skewed dimers. Further analysis, based on the degree of contribution from the second and beyond nearest neighbor silicon masses, allows us to assign the pair B as the skewed dimer absorption peaks while the pair A as the staggered dimer absorption peaks.

Original languageEnglish
Pages (from-to)959-962
Number of pages4
JournalPhysica B: Condensed Matter
Issue number1
Publication statusPublished - 2006 Apr 1
EventProceedings of the 23rd International Conference on Defects in Semiconductors -
Duration: 2005 Jul 242005 Jul 29


  • Isotopically enriched silicon
  • LVM
  • Linear chain calculation
  • Oxygen dimer

ASJC Scopus subject areas

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


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