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Phys Rev Lett. 2002 May 27;88(21):217203. Epub 2002 May 13.

Interaction-induced collapse of a section of the Fermi sea in the zigzag Hubbard ladder.

Author information

  • 1Institut für Physik, Universität Dortmund, 44221 Dortmund, Germany.

Abstract

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

PMID:
12059498
DOI:
10.1103/PhysRevLett.88.217203
[PubMed]
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