Superconductivity in the two-dimensional Hubbard model?

Details Superconductivity in the two-dimensional Hubbard model? Superconductivity in the two-dimensional Hubbard model?

2006-12-29

arxiv.org/abs/cond-mat/0612690v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure, Proc. 30th Int. Conf. of Theoretical Physics, Ustron, Poland, 2006, to be published in phys. stat. sol

Scientific paper

A refined variational wave function for the two-dimensional repulsive Hubbard model is studied numerically, with the aim of approaching the difficult crossover regime of intermediate values of U. The issue of a superconducting ground state with d-wave symmetry is investigated for an average electron density n=0.8125 and for U=8t. Due to finite-size effects a clear-cut answer to this fundamental question has not yet been reached.

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