Possibility of superconductivity in the repulsive Hubbard model on the Shastry-Sutherland lattice

Details Possibility of superconductivity in the repulsive Hubbard model on the Shastry-Sutherland lattice Possibility of superconductivity in the repulsive Hubbard model on the Shastry-Sutherland lattice

2003-06-06

arxiv.org/abs/cond-mat/0306163v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.69.054501

Possibility of superconductivity from electron repulsion in the Shastry-Sutherland lattice, which has a spin gap at half filling, is explored with the repulsive Hubbard model in the fluctuation-exchange approximation. We find that, while superconductivity is not favored around the half-filling, superconductivity is favored around the quarter-filling. Our results suggest that the Fermi surface nesting is more important than the spin dimerization for superconductivity.

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