Possibility of superconductivity in the repulsive Hubbard model on the Shastry-Sutherland lattice
- 6 February 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 69 (5), 054501
- https://doi.org/10.1103/physrevb.69.054501
Abstract
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.Keywords
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