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$η$-superconductivity in the one-dimensionnal pair hopping model

Georges Bouzerar·G. I. Japaridze
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Abstract

Using exact Lanczos diagonalizations we have shown that the pair-hopping model for {\it negative} $W$ exhibits a phase transition into $η$-{\it superconducting state}. The transition occurs at {\it any band filling} and the critical value $W_{c}$ varies between $W_{c} \simeq -1.75t$ at half-filling to $W_{c} \simeq -2t$ for two particles on the lattice.

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Georges Bouzerar, G. I. Japaridze. 1996-05-26. $η$-superconductivity in the one-dimensionnal pair hopping model. https://doi.org/10.1007/s002570050442

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