Non-magnetic defect in the two-dimensional s=1/2 Heisenberg antiferromagnet with honeycomb lattice

被引：2
|
作者：
de Châtel, PF [1 ]
Chadwick, J [1 ]
Mulders, AM [1 ]
Hicks, TJ [1 ]
机构：
[1] Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia
来源：
PHYSICA B-CONDENSED MATTER | 2004年 / 344卷 / 1-4期
基金：
澳大利亚研究理事会;
关键词：
quantized spin models; antiferromagnets; sublattice moments and zero point spin defect;
D O I：
10.1016/j.physb.2003.09.247
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the effect of a non-magnetic defect on the properties of the s = 1/2 two-dimensional Heisenberg antiferrornagnet with honeycomb lattice at T = 0. A modified Oguchi method is used to calculate the moment reduction and nearest-neighbour correlations for clusters of up to 13 spins embedded within the molecular field of the remainder of the lattice. A single non-magnetic defect is introduced to study the effect of magnetic dilution on the moment reduction. To the accuracy of the calculations there is no change in moment reduction for small dilutions. The dependence of the moment on dilution is further modelled by reducing the molecular field with magnetic dilution so that the approach to quantum criticality is a co-operative phenomenon. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：117 / 128
页数：12
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