Published July 1994 | Version v1
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A diagram technique for strongly interacting fermion systems. One- and two-band Hubbard models

Creators

  • 1. International Centre for Theoretical Physics, Trieste (Italy)
  • 2. Academy of Sciences of Moldova, Kishinev (Moldova, Republic of). Inst. of Applied Physics

Description

The basic notions of a diagram method for the one-band Hubbard model, including Green functions, generalized Wick theorem and Dyson equation are discussed. The study of Mott-Hubbard and superconducting transitions is based on a localized approximation for the irreducible two-particle Green function. A similar technique is developed for the two-band Hubbard model which is more closely related to the structure of CuO2 planes of high-Tc superconductors and to find the criterion of metal-insulator transition. 25 refs, 9 figs

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
34 p.
Report number
IC--94/182

INIS

Country of Publication
International Atomic Energy Agency (IAEA)
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
26004558
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BAND THEORY; DIAGRAMS; DYSON REPRESENTATION; ELECTRICAL INSULATORS; GREEN FUNCTION; HIGH-TC SUPERCONDUCTORS; HUBBARD MODEL; METALS; PHASE TRANSFORMATIONS; TRANSITION TEMPERATURE; WICK THEOREM
Descriptors DEC
CRYSTAL MODELS; ELECTRICAL EQUIPMENT; ELEMENTS; EQUIPMENT; FUNCTIONS; INFORMATION; MATHEMATICAL MODELS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES