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.
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页码：704 / 708
页数：5
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