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Interstitial carbon-oxygen center and hydrogen related shallow thermal donors in Si
School of Physics, University of Exeter.
School of Physics, University of Exeter.
Department of Physics, University of Newcastle.
Institute of Solid State and Semiconductor Physics, Minsk.
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2002 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 65, no 1, p. 014109-11Article in journal (Refereed) Published
Abstract [en]

The interstitial carbon-oxygen defect is a prominent defect formed in e-irradiated Cz-Si containing carbon. Previous stress alignment investigations have shown that the oxygen atom weakly perturb the carbon interstitial but the lack of a high-frequency oxygen mode has been taken to imply that the oxygen atom is severely affected and becomes overcoordinated. Local vibrational mode spectroscopy and ab initio modeling are used to investigate the defect. We find new modes whose oxygen isotopic shifts give further evidence for oxygen overcoordination. Moreover, we find that the calculated stress-energy tensor and energy levels are in good agreement with experimental values. The complexes formed by adding both single (CiOiH) and a pair of H atoms (CiOiH2), as well as the addition of a second oxygen atom, are considered theoretically. It is shown that the first is bistable with a shallow donor and deep acceptor level, while the second is passive. The properties of CiOiH and CiO2iH are strikingly similar to the first two members of a family of shallow thermal donors that contain hydrogen.

Place, publisher, year, edition, pages
2002. Vol. 65, no 1, p. 014109-11
National Category
Computational Mathematics
Research subject
Scientific Computing
Identifiers
URN: urn:nbn:se:ltu:diva-8594DOI: 10.1103/PhysRevB.65.014109ISI: 000173186000055Local ID: 71cfd580-c034-11db-834c-000ea68e967bOAI: oai:DiVA.org:ltu-8594DiVA, id: diva2:981532
Note
Validerad; 2002; 20070219 (kani)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Öberg, Sven

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