Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 21, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/1/015803
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Funding
- Academy of Finland through the Centres of Excellence Programme
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Vacancies in wurtzite GaN and AlN are studied using a computational method which is based on the density functional theory (DFT) and takes into account the errors arising from use of finite-sized supercells and the DFT band gap underestimation. Negatively charged N vacancies in GaN and AlN are found to be stable, with formation energies similar to and higher than those of Ga and Al vacancies in n-type material under Ga- and Al-rich growth conditions, respectively. The localization and energies of the defect levels close to the computational conduction band edge are considered in detail.
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