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

页码：322 / 325

页数：4

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