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High temperature superconductivity with repulsive pairing interactions


A pairing Hamiltonian H(Γ) with an interaction kernel Γ characterized by [-Γ0,-α0], where Γ0 denotes the separable part and α0 the degree of non-separability, produces high temperature superconductivity for both attractive Γ0>0 and repulsive Γ0<0 when α0>0. For Γ0>0, typical HTS properties, e.g. cuprate, are produced. Repulsive Γ0<0 produces a distinct difference in the kinetic energy dependence of the SC gap, significantly altering thermodynamic properties.

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