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Glide dislocations in diamond: first-principles calculations of similarities with and differences from silicon and the effects of hydrogen

M I Heggie1, C P Ewels1, N Martsinovich1, S Scarle1, R Jones2, J P Goss2, B Hourahine2 and P R Briddon3

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We review first-principles calculations of dislocation core structure in diamond, and draw out similarities with and differences from silicon. Primary differences are in hybridization changes in carbon and in the different behaviour of H interacting with dislocations. In both materials, condensation of a homogeneous distribution of H atoms should result, first, in formation of small H aggregates with the appearance of a glide dislocation dipole and, second, in formation of larger platelets based on the half-stacking-fault model.


PACS

61.72.Hh Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.)

61.72.Nn Stacking faults and other planar or extended defects

61.72.Bb Theories and models of crystal defects

Subjects

Condensed matter: structural, mechanical & thermal

Dates

Issue 48 (9 December 2002)

Received 1 October 2002

Published 22 November 2002



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