Valence-bond crystal phase of a frustrated spin-1/2 square-lattice antiferromagnet

被引：144

作者：

Zhitomirsky, ME ^{[1
]}

Ueda, K ^{[1
]}

机构：

[1] LD LANDAU THEORET PHYS INST,MOSCOW 117334,RUSSIA

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.54.9007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a magnetically disordered ground state for a frustrated quantum antiferromagnet. This disordered state is an array of spin singlets spontaneously formed on four spin plaquettes. Both perturbation results and bond-operator calculations show that this phase has lower energy than the columnar dimer state. Analysis of available numerical data on finite clusters also supports the conclusion that this state is realized at intermediate frustrations.

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页码：9007 / 9010

页数：4

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