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Improved wave functions for Hubbard model: Superconductivity and Mott transition
- Source :
-
Physica C . Oct2007, Vol. 463-465, p141-145. 5p. - Publication Year :
- 2007
-
Abstract
- Abstract: We extend the doublon–holon binding wave function, which was recently often used to consider Mott transitions and -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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09214534
- Volume :
- 463-465
- Database :
- Academic Search Index
- Journal :
- Physica C
- Publication Type :
- Academic Journal
- Accession number :
- 26496107
- Full Text :
- https://doi.org/10.1016/j.physc.2007.01.067