Interaction-induced collapse of a section of the Fermi sea in the zigzag Hubbard ladder |
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Authors: | Hamacher Kay Gros Claudius Wenzel Wolfgang |
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Institution: | Institut für Physik, Universit?t Dortmund, 44221 Dortmund, Germany. |
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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. |
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