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 t′. 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.
Original language | English |
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Pages (from-to) | 141-145 |
Number of pages | 5 |
Journal | Physica C: Superconductivity and its applications |
Volume | 463-465 |
Issue number | SUPPL. |
DOIs | |
Publication status | Published - 2007 Oct 1 |
Keywords
- Cuprate
- Hubbard model
- Mott transition
- Variational Monte Carlo method
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering