d-Mott phases in one and two dimensions
强关联电子
2007-05-23 v2 超导电性
摘要
We use exact diagonalization to determine the spectrum of reduced Hamiltonians based on renormalization group flows to strong coupling. For the half-filled two-leg Hubbard ladder we reproduce the known insulating d-Mott groundstate with spin and charge gaps. For the saddle point regions of the two-dimensional Hubbard model near half-filling we find a crossover to a similar strong coupling state, which truncates the Fermi surface near the saddle points. At lower scales d-wave superconductivity appears on the remaining Fermi surface.
引用
@article{arxiv.cond-mat/0309567,
title = {d-Mott phases in one and two dimensions},
author = {A. Laeuchli and C. Honerkamp and T. M. Rice},
journal= {arXiv preprint arXiv:cond-mat/0309567},
year = {2007}
}
备注
4 pages, 4 figures, published version, journal reference added