EXACT RESONATING-VALENCE-BOND GROUND-STATE AND POSSIBILITY OF SUPERCONDUCTIVITY IN REPULSIVE HUBBARD MODELS

被引：15

作者：

TASAKI, H

机构：

[1] Department of Physics, Gakushuin University, Toshima-ku, Tokyo 171, Mejiro

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.70.3303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We generalize the exactly solvable Hubbard model with infinitely large on-site Coulomb repulsion recently introduced by Brandt and Giesekus. We point out that the exact ground state can be regarded as a resonating-valence-bond state, and argue that the state may exhibit superconductivity. The existence of a phase with singlet-pair ordering is demonstrated in a simple model on a tree.

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页码：3303 / 3306

页数：4

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