t'- and t"-dependence of the bulk-limit superconducting condensation energy of the 2D Hubbard model

Details t'- and t"-dependence of the bulk-limit superconducting condensation energy of the 2D Hubbard model t'- and t"-dependence of the bulk-limit superconducting condensation energy of the 2D Hubbard model

2008-02-07

arxiv.org/abs/0802.0904v1

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures, ISS2007 Proc. (Physica C)

Scientific paper

10.1016/j.physc.2008.05.015

The 2D Hubbard model having the 2nd- and 3rd-neighbor transfer energies t' and t" is investigated by use of the variational Monte Carlo method. At the nearly optimal doping with on-site Coulomb energy U=6 (energy unit is t) the condensation energy Econd for the d-wave superconductivity (SC) is computed for lattices of sizes from 10x10 to 28x28 with the aim to get its bulk-limit value. t" is fixed at -t'/2. Outside and in the neighborhood of the SDW region of -0.16=

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