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Diagrammatic approach for the twofold degenerate Anderson impurity model

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dc.contributor.author MOSKALENKO, V. A.
dc.contributor.author DOHOTARU, L. A.
dc.contributor.author DIGOR, D. F.
dc.contributor.author CEBOTARI, I. D.
dc.date.accessioned 2020-09-17T13:07:27Z
dc.date.available 2020-09-17T13:07:27Z
dc.date.issued 2013
dc.identifier.citation MOSKALENKO, V. A., DOHOTARU, L. A., DIGOR, D. F., CEBOTARI, I. D. Diagrammatic approach for the twofold degenerate Anderson impurity model. In: Moldavian Journal of the Physical Sciences. 2013, vol. 12(3-4), pp. 199-220. ISSN 1810-648X. en_US
dc.identifier.issn 1810-648X
dc.identifier.uri http://repository.utm.md/handle/5014/9556
dc.description.abstract The twofold degenerate Anderson impurity model is investigated in normal and superconducting states, and the strong electronic correlations of d-electrons of impurity ion are taken into account by elaborating a suitable diagram technique. We discuss the properties of the SlaterKanamori model of d-impurity electrons. After finding the eigenfunctions and eigenvalues of all 16 local states, we determine the local one-particle propagator. Then we construct the perturbation theory around the atomic limit of the impurity ion and obtain the Dyson type equations between impurity electron propagators and normal and anomalous correlation functions. By summing infinite series of ladder diagrams, the approximation for correlation functions is established. The criterion for appearance of a superconducting state of the model is discussed. en_US
dc.language.iso en en_US
dc.publisher Academy of Sciences of Moldova en_US
dc.rights Attribution-NonCommercial-ShareAlike 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/us/ *
dc.subject Anderson impurity model en_US
dc.subject d-electron en_US
dc.subject impurity electrons en_US
dc.subject Green function en_US
dc.subject superconducting state en_US
dc.title Diagrammatic approach for the twofold degenerate Anderson impurity model en_US
dc.type Article en_US


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