Muonium defect states and ionization energies in SiGe alloys

King P. J. C., Lichti R. L., Carroll B. R., Celebi Y. G., Chow K. H., Yonenaga I.

PHYSICA B-CONDENSED MATTER, cilt.401, ss.617-620, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 401
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.physb.2007.09.035
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.617-620
  • İstanbul Üniversitesi Adresli: Evet

Özet

The determination of hydrogen energy levels in semiconducting materials is important owing to the ability of hydrogen impurity to either compensate dopant activity in some materials or to act as a dopant itself in others. Although direct observation of hydrogen levels is difficult owing to its high mobility and reactivity, data can be provided using the hydrogen analog muonium, formed by implantation of positive unions. We present here muonium studies of bulk Si(1-x)Ge(x) alloys aimed at extraction of hydrogen energy levels within this system. A simple band alignment model predicts the behavior of donor and acceptor muonium species across the alloy range. This model is compared with experimentally determined donor and acceptor levels extracted from the temperature dependence of muonium amplitudes. (c) 2007 Elsevier B.V. All rights reserved.