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Density functional based modelling of 30° partial dislocations in SiC

Blumenau, A.T. (author)
Department of Physics, Faculty of Science, University of Paderborn
Jones, R. (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
Frauenheim, T. (author)
Department of Physics, University of Newcastle
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 (creator_code:org_t)
Stafa-Zuerich : Trans Tech Publications Inc. 2004
2004
English.
In: Proceedings of the 10th International Conference on Silicon Carbide and Related Materials, ICSCRM 2003. - Stafa-Zuerich : Trans Tech Publications Inc.. - 0878499431 ; , s. 453-456
  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • Experiment has shown that 4H- and 6H-SiC pin diodes degrade rapidly during forward biased operation. This degradation is accompanied by the formation and expansion of stacking faults in the basal plane. It is believed that the observed rapid stacking fault growth is due to a recombination-enhanced dislocation glide (REDG) mechanism at the bordering partial dislocations. In our work we investigate the structure and properties of basal plane 30° Shockley partials in SiC by means of density functional based calculations. Barriers to their glide motion, and thus the expansion of the accompanying stacking fault is modelled in a process involving the formation and subsequent migration of kinks in the dislocation. In combination with an analysis of the electronic structure of the partials and stacking faults, this allows an identification of those types of partials which will be affected by the REDG mechanism in this model.

Subject headings

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

Keyword

Scientific Computing
Teknisk-vetenskapliga beräkningar

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Blumenau, A.T.
Jones, R.
Öberg, Sven
Briddon, P.R.
Frauenheim, T.
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NATURAL SCIENCES
NATURAL SCIENCES
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and Computational Ma ...
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Luleå University of Technology

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