1/S EXPANSION FOR THERMODYNAMIC QUANTITIES IN A 2-DIMENSIONAL HEISENBERG-ANTIFERROMAGNET AT ZERO TEMPERATURE

被引：166

作者：

IGARASHI, J

机构：

[1] Department of Physics, Faculty of Science, Osaka University, Toyonaka

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.46.10763

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the spin-wave dispersion, the perpendicular susceptibility, the spin-stiffness constant, and the sublattice magnetization of a two-dimensional Heisenberg antiferromagnet at T=0, to order 1/(2S)2, treating carefully the umklapp processes. Our numerical estimates for the thermodynamic quantities are in good agreement with series-expansion estimates, and satisfy the hydrodynamic relation very accurately.

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页码：10763 / 10771

页数：9

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