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

被引：18

作者：

Hamacher, K ^{[1
]}

Gros, C

Wenzel, W

机构：

[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

[2] Univ Saarland, Fak 7, D-66041 Saarbrucken, Germany

[3] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.88.217203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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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页码：4 / 217203

页数：4

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