Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819918 | Physica C: Superconductivity and its Applications | 2007 | 5 Pages |
Abstract
We extend the doublon-holon binding wave function, which was recently often used to consider Mott transitions and dx2-y2-wave superconductivity, for the half-filled-band Hubbard model on square lattices with the diagonal hopping tâ². We introduce two new features: (1) In the doublon-holon binding factor, more accurate configuration correlations are included. (2) The band renormalization effect owing to the electron correlation is introduced within the third-neighbor hopping, including the anisotropy between x- and y-directions in the nearest-neighbor hopping. Using an optimization variational Monte Carlo technique, we draw some definite answers to the topics concerning the above features.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Kenji Kobayashi, Hisatoshi Yokoyama,