Positron states at vacancy-impurity pairs in semiconductors

S. Mäkinen*, M. J. Puska

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)
96 Downloads (Pure)

Abstract

Positron states at pure monovacancies and divacancies and vacancy-phosphorus pairs in Si as well as at As vacancies and As-vacancy As-antisite pairs in GaAs are calculated. The dependence of the positron lifetime on the lattice relaxation around the defects is studied, and the effects related to the screening of positrons are discussed. The calculations are based on superimposing free atoms. The ability of the method to describe positron states at charged defects is demonstrated.

Original languageEnglish
Pages (from-to)12523-12526
Number of pages4
JournalPhysical Review B
Volume40
Issue number18
DOIs
Publication statusPublished - 15 Dec 1989
MoE publication typeA1 Journal article-refereed

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