BOND-OPERATOR REPRESENTATION OF QUANTUM SPINS - MEAN-FIELD THEORY OF FRUSTRATED QUANTUM HEISENBERG ANTIFERROMAGNETS

被引：443

作者：

SACHDEV, S ^{[1
]}

BHATT, RN ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.41.9323

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We introduce a new representation of S=1/2 quantum spins in terms of bond operators. The bond operators create and annihilate singlet and triplet bonds between a pair of spins. The representation is useful in describing the transition between dimerized and magnetically ordered phases of quantum antiferromagnets. It is used to obtain a mean-field theory of the two-dimensional frustrated quantum Heisenberg antiferromagnets considered recently by Gelfand, Singh, and Huse. The method should also be useful in the analysis of random quantum antiferromagnets. © 1990 The American Physical Society.

引用

页码：9323 / 9329

页数：7

共 13 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].