Superconducting ground state of the two-dimensional Hubbard model: a variational study
Strongly Correlated Electrons
2009-11-11 v1 Superconductivity
Abstract
A trial wave function is proposed for studying the instability of the two-dimensional Hubbard model with respect to d-wave superconductivity. Double occupancy is reduced in a similar way as in previous variational studies, but in addition our wave function both enhances the delocalization of holes and induces a kinetic exchange between the electron spins. These refinements lead to a large energy gain, while the pairing appears to be weakly affected by the additional term in the variational wave function.
Keywords
Cite
@article{arxiv.cond-mat/0608210,
title = {Superconducting ground state of the two-dimensional Hubbard model: a variational study},
author = {David Eichenberger and Dionys Baeriswyl},
journal= {arXiv preprint arXiv:cond-mat/0608210},
year = {2009}
}
Comments
2 pages, 1 figure, Proceedings of the M2S-HTSC-VIII