Antiferromagnetic Ising model in scale-free networks

被引：11
|
作者：
Herrero, C. P. [1 ]
机构：
[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
来源：
EUROPEAN PHYSICAL JOURNAL B | 2009年 / 70卷 / 03期
关键词：
SPIN-GLASSES; POWER LAWS; INTERNET;
D O I：
10.1140/epjb/e2009-00240-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The antiferromagnetic Ising model in uncorrelated scale-free networks has been studied by means of Monte Carlo simulations. These networks are characterized by a connectivity ( or degree) distribution P(k) similar to k(-gamma). The disorder present in these complex networks frustrates the antiferromagnetic spin ordering, giving rise to a spin-glass (SG) phase at low temperature. The paramagnetic-SG transition temperature T-c has been studied as a function of the parameter gamma and the minimum degree present in the networks. T-c is found to increase when the exponent gamma is reduced, in line with a larger frustration caused by the presence of nodes with higher degree.
引用
收藏
页码：435 / 441
页数：7
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