Plaquette resonating-valence-bond ground state of CaV4O9

被引：118

作者：

Ueda, K ^{[1
]}

Kontani, H ^{[1
]}

Sigrist, M ^{[1
]}

Lee, PA ^{[1
]}

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.76.1932

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A theoretical model is presented to explain the spin gap observed for CaV4O9. The underlying lattice of the 1/5-depleted square lattice favors a formation of the plaquette resonating-valence-bond state. Inclusion of the frustrating second neighbor interaction enhances this tendency, leading to a quantum disordered state of a two-dimensional spin-1/2 Heisenberg model with a sufficiently big spin gap compatible with experiments.

引用

收藏

页码：1932 / 1935

页数：4

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