Thermodynamics of the random antiferromagnetic spin-1 chain

被引：1
作者：
Saguia, A [1 ]
Boechat, B [1 ]
Continentino, MA [1 ]
机构：
[1] Univ Fed Fluminense, Dept Fis, BR-24210130 Niteroi, RJ, Brazil
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷
关键词：
random systems; renormalization group; thermodynamics;
D O I：
10.1016/S0304-8853(00)00704-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The random exchange antiferromagnetic Heisenberg spin-1 chain at finite temperature is studied using a renormalization-group method. We follow the evolution of the bond probability distribution and calculate the free energy of the system. The spurious results found for the free energy shows that the standard renormalization group approach used for spin-1/2 chains does not guarantee the existence of the random singlet phase in the random spin-1 chain even in the presence of strong disorder. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1300 / 1302
页数：3
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