期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 25, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/6/065502
关键词
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资金
- EPRSC [EP/F067496]
- Office of Science and Technology through EPSRC's High End Computing Programme
- EPSRC via the DIAMOND consortium [EP/F055412/1]
- US Department of Energy (DOE), Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering
- National Nuclear Security Administration of the US Department of Energy [DE-AC52-06NA25396]
- EPSRC [EP/F055412/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F055412/1] Funding Source: researchfish
Density functional theory was used to study the effects of charge localization on the structure and mobility of the highly mobile hexa-interstitial cluster in MgO. It was found that the relative stability of the configurations changed as charge was localized, with the higher energy intermediate configuration of the neutral cluster becoming the lowest energy configuration for the doubly charged cluster. The singly charged cluster was found to have the lowest migration barrier, with a barrier of 0.18 eV. The high mobility of the singly charged hexa-interstitial cluster could have a significant effect on microstructure evolution following radiation damage, while the detailed properties will be sensitive to the level of doping in the material.
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