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.

引用

页码：139 / 142

页数：4

共 23 条

[21] The pseudogap in high-temperature superconductors: an experimental survey [J].

Timusk, T ;

Statt, B .

REPORTS ON PROGRESS IN PHYSICS, 1999, 62 (01) :61-122

[22] PSEUDOGAP FORMATION IN THE HALF-FILLED HUBBARD-MODEL [J].

VEKIC, M ;

WHITE, SR .

PHYSICAL REVIEW B, 1993, 47 (02) :1160-1163

[23] NUMERICAL STUDY OF THE TWO-DIMENSIONAL HUBBARD-MODEL [J].

WHITE, SR ;

SCALAPINO, DJ ;

SUGAR, RL ;

LOH, EY ;

GUBERNATIS, JE ;

SCALETTAR, RT .

PHYSICAL REVIEW B, 1989, 40 (01) :506-516

← 1 2 3 →