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.
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页码：9323 / 9329
页数：7
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