Quantum critical properties of a spin-1/2 Heisenberg ferromagnet with easy-plane anisotropy in a transverse field

被引：4

作者：

D'Auria, AC

De Cesare, L

Mercaldo, MT

Rabuffo, I ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Fis ER Caianiello, I-84100 Salerno, Italy

[2] Ist Nazl Fis Mat, Unita Napoli, Naples, Italy

[3] Ist Nazl Fis Mat, Unita Salerno, Salerno, Italy

[4] Univ Naples, Dipartimento Sci Fis, Naples, Italy

来源：

PHYSICS LETTERS A | 2003年 / 318卷 / 1-2期

关键词：

anisotropic Heisenberg model; quantum phase transitions;

D O I：

10.1016/j.physleta.2003.08.075

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Wilson renormalization group is used to investigate the low-temperature critical properties of a spin-1/2 Heisenberg ferromagnet with easy-plane anisotropy in a transverse field. The phase diagram and the main critical exponents close to the quantum critical point are obtained for dimensionalities d > 2. Crossover phenomena are found to occur decreasing the temperature and the related effective exponents are determined. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：156 / 160

页数：5

共 20 条

[1] Field-induced gap in Cu benzoate and other S=1/2 antiferromagnetic chains [J].