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Thermal double donors in Si and Ge

Jones, R. (author)
School of Physics, University of Exeter
Coutinho, J. (author)
School of Physics, University of Exeter
Öberg, Sven (author)
Luleå tekniska universitet,Matematiska vetenskaper
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Briddon, P.R. (author)
Department of Physics, University of Newcastle
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 (creator_code:org_t)
2001
2001
English.
In: Physica. B, Condensed matter. - 0921-4526 .- 1873-2135. ; 308, s. 8-12
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Three experiments appear to cast doubt on self-interstitial-free models of the family of thermal donors, based on oxygen defects of increasing size. These are (a) the rapid transformation of TDD(N) into TDD(N+1) with activation energies considerably lower than that of oxygen diffusion, (b) the lack of any appreciable spin-density on oxygen in TDD(N)+, and (c) the observation of only two oxygen related vibrational modes associated with each donor. However, we show that the oxygen-only model of the donors is compatible with experiment for a structure involving an insulating core with normal oxygen coordination, surrounded by over-coordinated oxygen atoms which are responsible for the donor activity. It is also shown that the calculated stress-energy tensors for the early donors are in good agreement with the measurements.

Subject headings

NATURVETENSKAP  -- Matematik -- Beräkningsmatematik (hsv//swe)
NATURAL SCIENCES  -- Mathematics -- Computational Mathematics (hsv//eng)

Keyword

Scientific Computing
Teknisk-vetenskapliga beräkningar

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Jones, R.
Coutinho, J.
Öberg, Sven
Briddon, P.R.
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NATURAL SCIENCES
NATURAL SCIENCES
and Mathematics
and Computational Ma ...
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Physica. B, Cond ...
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Luleå University of Technology

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