Interstitials, vacancies and impurities in diamond

Citation
G. Davies et al., Interstitials, vacancies and impurities in diamond, PHYS ST S-A, 186(2), 2001, pp. 187-198
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
0031-8965 → ACNP
Volume
186
Issue
2
Year of publication
2001
Pages
187 - 198
Database
ISI
SICI code
0031-8965(20010723)186:2<187:IVAIID>2.0.ZU;2-E
Abstract
Diamond is a very simple crystalline system, and we would expect that the e ffects of radiation damage should be easily understood. As an example of it s simplicity, we note that diamond contains only one species of atom, and w e show that the effects of isotopic substitution at the self-interstitial c an be understood quantitatively. However, there are surprising gaps in our current Understanding. At low temperatures, and in pure diamond, the rates of producing neutral vacancies and self-interstitials are equal. but when t he irradiation temperature exceeds similar to 120 K there is a significant loss of observable I-0 centres by a process that is not yet known, The reac tion kinetics of I-0 are not Vet understood, and one complication is the ex istence of barriers to reactions between defects. which will result in vari ous metastable configurations. In nitrogen-doped diamond, there is evidence for a considerable reduction in the rate of correlated recombination in th e locality of the nitrogen impurity, which has possible implications for th e radiation hardness of strained diamond.