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Phys Rev Lett. 2013 Feb 8;110(6):065504. Epub 2013 Feb 7.

Functional complex point-defect structure in a huge-size-mismatch system.

Author information

  • 1Institute of Engineering Innovation, University of Tokyo, 2-11-16, Yayoi, Bunkyo, Tokyo 113-8656, Japan.

Abstract

Cubic boron nitride is a promising system for photonics and optoelectronics. Determining the inclusion mechanisms for dopants with a large size mismatch, such as luminous rare-earth elements, is prerequisite to understanding their functional properties and to effective doping control. Combining evidence from subangstrom resolution scanning transmission electron microscopy, imaging simulations, and first-principles calculations, we show that cationic Ce(3+) single dopants are not located at cationic B sites but rather at anionic N sites surrounded by B-site vacancies.

PMID:
23432272
[PubMed]
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