1/Z EXPANSION FOR HEISENBERG ANTIFERROMAGNET AT LOW TEMPERATURES

被引：21

作者：

HARRIS, AB

机构：

[1] Department of Physics, University of Pennsylvania, Philadelphia

[2] Theoretical Physics Division, Atomic Energy Research Establishment, Harwell, Didcot, Berkshire

来源：

PHYSICAL REVIEW LETTERS | 1968年 / 21卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.21.602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown that the expansion in density of spin deviations for the Heisenberg antiferromagnet at low temperatures leads to a 1z expansion for the free energy. In contrast to the 1S expansion, the kinematic properties of spin operators are realized within each order of the expansion. The spin-wave energy at long wavelength is also calculated. © 1968 The American Physical Society.

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页码：602 / &

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