Abstract
We examine the ‘η pairing’ superconductivity using the negative U Hubbard model on the bipartite lattice. The superconducting gap parameter for η pairing is compared with the equilibrium Hartree-Fock-Bogolubov solution for the half-filled system in various temperatures and strengths of interaction. The quasiparticle density of states and the single particle tunneling are investigated.
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