Pseudogaps in the 2D Hubbard model

被引：114

作者：

Huscroft, C ^{[1
]}

Jarrell, M ^{[1
]}

Maier, T ^{[1
]}

Moukouri, S ^{[1
]}

Tahvildarzadeh, AN ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.86.139

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the pseudogaps in the spectra of the 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. At half-filling, a charge: pseudogap. accompanied by non-Fermi-liquid behavior in the self-energy. is shown to persist in the thermodynamic limit. The DCA (finite-size) method systematically underestimates (overestimates) the width of the pseudogap. A spin pseudogap is not seen at half-filling. At finite doping. a divergent d-wave pair susceptibility is observed.

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页码：139 / 142

页数：4

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