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Pressure-induced phase transition of SiC

Murat Durandurdu

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The pressure-induced phase transition in silicon carbide is studied using a constant-pressure ab initio technique. The reversible transition between the zinc-blende structure and the rock-salt structure is successfully reproduced through the simulation. The transformation mechanism at the atomistic level is characterized, and it is found that the transition is based on a tetragonal and an orthorhombic intermediate state. The space groups of the intermediate states are determined as I\bar {4}m2 and Imm 2.


PACS

61.50.Ks Crystallographic aspects of phase transformations; pressure effects

71.15.-m Methods of electronic structure calculations

61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 25 (30 June 2004)

Received 24 April 2003

Published 11 June 2004



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