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New transformation mechanism for a zinc-blende to rocksalt phase transformation in MgS

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Murat Durandurdu

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The stability of the zinc-blende structured MgS is studied using a constant pressure ab initio molecular dynamics technique. A phase transition into a rocksalt structure is observed through the simulation. The zinc-blende to rocksalt phase transformation proceeds via two rhombohedral intermediate phases within R3m (No:160) and R\bar {3}m (No:166) symmetries and does not involve any bond breaking. This mechanism is different from the previously observed mechanism in molecular dynamics simulations.


PACS

64.70.K- Solid–solid transitions

61.66.Fn Inorganic compounds

62.50.-p High-pressure effects in solids and liquids

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

Subjects

Condensed matter: structural, mechanical & thermal

Dates

Issue 45 (11 November 2009)

Received 7 September 2009, in final form 2 October 2009

Published 21 October 2009



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