ZERO-TEMPERATURE PROPERTIES OF THE QUANTUM XY MODEL WITH ANISOTROPY

被引：36

作者：

HAMER, CJ

OITMAA, J

ZHENG, WH

机构：

[1] School of Physics, University of New South Wales, Kensington, NSW 2033

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.43.10789

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spin-1/2 XY model on a square lattice is studied via series expansions around the Ising limit, and spin-wave theory. Series are calculated for the ground-state energy, mass gap, magnetization, and magnetic susceptibilities. Extrapolating these series to the isotropic limit, we find extremely good agreement with the predictions of second-order spin-wave theory.

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页码：10789 / 10796

页数：8

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