Journal
PHILOSOPHICAL MAGAZINE
Volume 87, Issue 16-17, Pages 2561-2569Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786430701235814
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Density functional (DFT) calculations have been used to investigate the stability of point defects in uranium dioxide. Correlation effects are taken into account within the DFT + U approach as implemented in the Vienna ab initio simulation package (VASP). More particularly, the formation energies of both intrinsic and extrinsic point defects, i.e. vacancies, interstitials, Frenkel pairs and Schottky trio defects, are calculated. Our results are compared with available experimental data and are also discussed in relation to previous calculations based on conventional functionals, such as the local spin-density approximation and generalized gradient approximations.
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