KAGOME SPIN-1/2 ANTIFERROMAGNETS IN THE HYPERBOLIC PLANE

被引：44

作者：

ELSER, V

ZENG, C

机构：

[1] Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.48.13647

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-dimerized states are useful in the construction of spin-disordered wave functions but difficult to deal with because of nonorthogonality. For the spin-1/2 kagome antiferromagnet, a systematic expansion of matrix elements of these nonorthogonal states is made possible by considering generalizations of the kagome structure in the hyperbolic plane. The first nontrivial term in this expansion is an effective spin Hamiltonian which describes resonance among dimerized states. Minimum-energy states of the effective Hamiltonian correspond to a high degree of resonance among a small fraction of the dimers.

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页码：13647 / 13653

页数：7

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