Positron annihilation in SiC

Research output: Contribution to journalArticlepeer-review

Abstract

Valence electron and positron charge densities in SiC are obtained from wave functions derived in a model pseudopotential bandstructure calculation. It is observed that the positron density is maximum in the open interstices and is excluded not only from the ion cores but also, to a considerable degree, from the valence bonds. Electron-positron momentum densities are calculated for the (001-110) plane. The results are used to analyze the positron effect in large gap semiconductors.

Original languageEnglish
Pages (from-to)957-966
Number of pages10
JournalInternational Journal of Modern Physics C
Volume13
Issue number7
DOIs
Publication statusPublished - Sep 2002

Keywords

  • Momentum density
  • Positron annihilation
  • Pseudopotential
  • Wave function

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Theory and Mathematics

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