d-Mott phases in one and two dimensions

Details d-Mott phases in one and two dimensions d-Mott phases in one and two dimensions

2003-09-24

arxiv.org/abs/cond-mat/0309567v2

Phys. Rev. Lett. 92, 037006 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, published version, journal reference added

Scientific paper

10.1103/PhysRevLett.92.037006

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.

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