Spin gap in CaV4O9: A large-S approach

被引：39

作者：

Albrecht, M

Mila, F

机构：

[1] Laboratoire de Physique Quantique, Université Paul Sabatier

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.53.R2945

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the stability of the four-site plaquette order in a model recently introduced by Katoh and Imada to explain the spin gap observed in CaV4O9. We show that all relevant types of order (four-site plaquette, dimerized, Neel) can be described within the framework of Schwinger-boson mean-field theory, and we make predictions regarding their relative stability. The results are compared to-exact diagonalization of finite clusters.

引用

页码：R2945 / R2947

页数：3

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