Single-site Anderson model. II Perturbation theory of symmetric model

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dc.creatorMoskalenko, V. A.
dc.creatorEntel, P.
dc.creatorDigor, D. F.
dc.creatorDohotaru, L. A.
dc.creatorCitro, R.
dc.date2007-01-13
dc.date.accessioned2026-07-07T07:40:50Z
dc.date.available2026-07-07T07:40:50Z
dc.descriptionThe strong electron correlations caused by Coulomb interaction of impurity electrons are taken into account. The infinite series of diagrams containing irreducible Green's functions are summed. For symmetric Anderson model we establish the antisymmetry property of the impurity Green's function, formulate the exact Dyson type equation for it, find the approximate correlation function $Z_σ(iω$) and solve the integral equation which determines the full propagator of the impurity electrons. Analytical continuation of the obtained Matsubara Green's function determines the retarded one and gives the possibility to find the spectral function of impurity electrons. The existence of two resonances of this function has been proved. The smooth behaviour was found near the Fermi surface. The two resonances situated symmetrical to the Fermi surface correspond to the energies of quantum transitions of the impurity electrons. The widths and heights of these resonances are established.
dc.description7 pages, 1 figure, revtex4, Submitted to Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0701298
dc.identifierhttp://arxiv.org/abs/cond-mat/0701298
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/121898
dc.subjectStrongly Correlated Electrons
dc.titleSingle-site Anderson model. II Perturbation theory of symmetric model
dc.typetext

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