Detection of pairing correlation in the two-dimensional Hubbard model

被引：7

作者：

Kuroki, K ^{[1
]}

Aoki, H ^{[1
]}

Hotta, T ^{[1
]}

Takada, Y ^{[1
]}

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.55.2764

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantum Monte Carlo method is used to reexamine superconductivity in the single-band Hubbard model in two dimensions. Instead of the conventional pairing, we consider a ''correlated pairing,'' [<(C)over tilde ij><(C)over tilde i'down arrow>] with <(C)over tilde (i sigma)>=C-i sigma(1 - n(i-sigma)), which is inferred from the t-J model, the strong-coupling limit of the Hubbard model. The pairing in the d-wave channel is found to possess both a divergence like 1/T in the pairing susceptibility and a growth of the ground-state pairing correlation with sample size, indicating an off-diagonal long-range order near (but not exactly at) half-filling.

引用

页码：2764 / 2767

页数：4

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