Exact Results on Superconductivity due to Interband Coupling
classification
❄️ cond-mat
keywords
interbandpropertiessuperconductivityalgebraarbitrarybcs-typecouplingdiagonalized
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We present a family of exactly solvable models at arbitrary filling in any dimensions which exhibit novel superconductivity with interband pairing. By the use of the hidden $SU(2)$ algebra the Hamiltonians were diagonalized explicitly. The zero-temperature phase diagrams and the thermodynamic properties are discussed. Several new properties are revealed which are different from those of the BCS-type superconductor.
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