期刊
APPLIED PHYSICS LETTERS
卷 94, 期 25, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3152781
关键词
carbon; density functional theory; doping profiles; electronic structure; geometry; magnesium compounds; magnetic moments; nitrogen
资金
- Science Foundation of Ireland
The formation of the magnetic moment in C- and N-doped MgO is the result of a delicate interplay between Hund's coupling, hybridization, and Jahn-Teller distortion. The balance depends on a number of environmental variables including electron doping. We investigate such a dependence by self-interaction corrected density functional theory and we find that the moment formation is robust with respect to electron doping. In contrast, the local symmetry around the dopant is more fragile and different geometries can be stabilized. Crucially the magnetic moment is always extremely localized, making any carrier mediated picture of magnetism in d(0) magnets unlikely.
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