Interaction induced collapse of a section of the Fermi sea in in the zig-zag Hubbard ladder

Details Interaction induced collapse of a section of the Fermi sea in in the zig-zag Hubbard ladder Interaction induced collapse of a section of the Fermi sea in in the zig-zag Hubbard ladder

2001-12-19

arxiv.org/abs/cond-mat/0112347v2

Phys. Rev. Lett. 88, 217203 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.88.217203

Using the next-nearest neighbor (zig-zag) Hubbard chain as an one dimemensional model, we investigate the influence of interactions on the position of the Fermi wavevectors with the density-matrix renormalization-group technique (DMRG). For suitable choices of the hopping parameters we observe that electron-electron correlations induce very different renormalizations for the two different Fermi wavevectors, which ultimately lead to a complete destruction of one section of the Fermi sea in a quantum critical point.

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