Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-01-13
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 5 figures, revtex4, Submitted to Phys. Rev. B
Scientific paper
The diagrammatic theory is proposed for the strongly correlated impurity Anderson model. The strongly correlated impurity electrons are hybridized with free conduction electrons. For this system the new diagrammatic approach is formulated. The linked cluster theorem for vacuum diagrams is proved and the Dyson type equations for electron propagators of both electron subsystems are established, together with such equations for mixed propagators. The approximations based on the summing the infinite series of diagrams are proposed, which close the system of equations and permit the investigation of the system's properties.
Citro Roberta
Digor D. F.
Dohotaru L. A.
Entel Peter
Moskalenko V. A.
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