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Superconductivity in the Extended Hubbard Model
Author(s) -
Bulka B. R.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221630120
Subject(s) - hubbard model , superconductivity , square lattice , condensed matter physics , formalism (music) , physics , mean field theory , lattice (music) , statistical physics , theoretical physics , quantum mechanics , ising model , art , musical , acoustics , visual arts
The extended Hubbard model on a square lattice is considered in the framework of the mean‐field formalism. A detailed analysis of the stability of the superconducting state of the s‐ and the d‐type symmetry is performed for different band filling. Special attention is focused on the state with mixed sd‐type symmetry, which may occur at an intermediate strength of interactions.