Structure and electronic properties of amorphous indium phosphide from first principles

Laurent J. Lewis, Alessandro De Vita, Roberto Car

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We report detailed and extensive first-principles molecular-dynamics (MD) simulations of the structure and electronic properties of amorphous InP produced by rapid quenching from the liquid. The structure of the material is found to be strongly ordered chemically, even though there is a significant number of coordination defects and despite the presence of odd-membered rings. We find, as a consequence, that there exist “wrong bonds” in the system, in an amount of about 8%; these result from the presence of coordination defects, not of local composition fluctuations, as has been conjectured. The system, in fact, is found to be overcoordinated, which might be the reason for the observed higher density of (Formula presented)-InP compared to (Formula presented)-InP. We have also investigated the possibility of pressure-amorphizing InP. Our calculations indicate that the cost of a transformation of the compressed zinc-blende crystal into an amorphous phase is so large that it is very unlikely that it would take place.

Original languageEnglish (US)
Pages (from-to)1594-1606
Number of pages13
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume57
Issue number3
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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