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

Abstract

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.

References in corpus (2)

• Modeling the electronic behavior of $\gamma$-LiV2O5: a microscopic study
• Fermi surface renormalization in Hubbard ladders

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