SPHERICAL SYMMETRICAL SPIN-WAVE THEORY OF HEISENBERG-MODEL

被引：29

作者：

BARABANOV, AF

STARYKH, OA

机构：

[1] Institute for High Pressure Physics, Troitsk, Moscow Region

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1992年 / 61卷 / 02期

关键词：

2D ANTIFERROMAGNETIC HEISENBERG MODEL; GROUND STATE; DYNAMIC STRUCTURE FACTOR;

D O I：

10.1143/JPSJ.61.704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We represent simple decoupling scheme for two-time spin Green's function which leads to the rotational invariant spin wave theory for low dimensional Heisenberg magnetics without broken symmetry and with correct sum rule S ---overnot r2 = S(S+1). For two-dimensional S = 1/2 antiferromagnet this theory predicts disordered ground state while for S > 1/2 it possesses long range order at T = 0. The dynamic structure factor is calculated.

引用

页码：704 / 708

页数：5

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