Registration Number
0209U008405,
0107U007768
, R & D reports
Title
The mechanisms of exchange in diluted magnetic semiconductors.
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Head
Ryabchenko S.M.,
Registration Date
24-03-2009
Organization
Institute of physics NASU
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The parameters of the equilibrated lattice for semiconductors II-VI, which correspond to a minimum of full energy, are established within the framework of the local density approximation. The electronic structure ZnO doped by monovalent metals (Li, Na) is theoretically investigated. The theory of an effective crystal field for the ЕPR experiments analysis is developed and microscopically grounded in framework of the multipartial perturbation theory. The model of superexchange interaction of transition element ions, which substitute for the ions of zinc in ZnО is developed. The formulas for effective integral of a superexchange are received within the framework of the fourth order of the perturbation theory. The model, which describes influence of a paramagnetic impurity d level on an electronic state of ZnО valence bond, is considered. It is found out, that the mode of strong interaction results in the holes localization near of Co and Mn impurities in ZnО.5635
Product Description
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2020-04-02
