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Properties of the η ‐pairing phase of the Penson–Kolb model
Author(s) -
Robaszkiewicz S.,
Czart W. R.
Publication year - 2003
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.200301693
Subject(s) - pairing , superfluidity , condensed matter physics , phase diagram , cooper pair , phase (matter) , physics , superconductivity , momentum (technical analysis) , tight binding , quantum mechanics , electronic structure , finance , economics
Penson–Kolb model, i.e. the tight‐binding model with the pair‐hopping (intersite charge exchange) interaction J is considered. In the analysis we focus on the properties of the superconducting state with Cooper‐pair center‐of‐mass momentum q = Q ( η ‐phase), which can develop in this model for the case of repulsive J ( J < 0). The evolutions of the phase diagrams, the critical temperatures and superfluid characteristics with particle concentration and pairing strength are discussed.