SELF-CONSISTENT MEAN-FIELD APPROXIMATION FOR THE SQUARE-LATTICE FRUSTRATED HEISENBERG-MODEL

被引：4
|
作者：
CUI, SM [1 ]
机构：
[1] JIAO TONG UNIV,DEPT PHYS,INST CONDENSED MATTER,SHANGHAI 200030,PEOPLES R CHINA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 28期
关键词：
D O I：
10.1088/0953-8984/4/28/003
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A self-consistent mean-field method is used to obtain the phase diagram of the frustrated antiferromagnetic Heisenberg model with next-nearest-neighbour exchange couplings on a square lattice at zero temperature starling with a Holstein-Primakoff transformation. It is suggested that the Neel-type order is not destroyed for any value of the ratio of the nearest- to next-nearest-neighbour exchange couplings for S greater-than-or-equal-to 1, while for S = 1/2 there may exist a disordered phase for strong frustration.
引用
收藏
页码：L389 / L394
页数：6
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