Transverse Ising antiferromagnetic in a longitudinal magnetic field: study of the ground state

被引：15
|
作者：
Neto, MA [1 ]
de Sousa, JR [1 ]
机构：
[1] Univ Fed Amazonas, Dept Fis, Inst Ciencias Exatas, BR-69077000 Manaus, Amazonas, Brazil
来源：
PHYSICS LETTERS A | 2004年 / 330卷 / 05期
关键词：
D O I：
10.1016/j.physleta.2004.07.042
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The two-dimensional antiferromagnetic Ising model in a transverse magnetic field (Omega) and uniform longitudinal field is studied for the first time (H). Using the effective-field theory (EFT) with correlation in one-site cluster calculation the ground-state phase diagram in the Omega-H plane is determined for the honeycomb (z = 3) and square (z = 4) lattices. It is shown that there is an order-disordered transition line (second-order phase transition) qualitatively in agreement with rigorous results of renormalization group in d = 1. The critical curve in the classical approach is also obtained and the results are compared. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码：322 / 325
页数：4
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