Quasiparticle Excitations and Charge Transition Levels of Oxygen Vacancies in Hafnia
Open Access
- 16 November 2011
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 107 (21), 216803
- https://doi.org/10.1103/physrevlett.107.216803
Abstract
We calculate the quasiparticle defect states and charge transition levels (CTLs) of oxygen vacancies in monoclinic hafnia using density functional theory (DFT) and the method. We introduce the criterion that the quality and reliability of CTLs may be evaluated by calculating the same CTL via two physical paths and show that it is necessary to include important electrostatic corrections previously neglected within the supercell approach. Contrary to previous reports, the oxygen vacancies in hafnia are large positive centers, where is the defect charging energy.
Keywords
Funding Information
- National Science Foundation
- U.S. Department of Energy
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