Quantum Berezinskii-Kosterlitz-Thouless transition in square-lattice magnets with easy-plane anisotropy

被引：10

作者：

Capriotti, L

Cuccoli, A

Tognetti, V

Vaia, R

Verrucchi, P

机构：

[1] CNR, Ist Elettron Quantist, I-50127 Florence, Italy

[2] Ist Nazl Fis Mat, I-50125 Florence, Italy

[3] Univ Firenze, Dipartimento Fis, I-50125 Florence, Italy

[4] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICA D | 1998年 / 119卷 / 1-2期

关键词：

quantum statistical mechanics; 2D XXZ model; Kosterlitz-Thouless transition; magnetic correlation length;

D O I：

10.1016/S0167-2789(98)00065-7

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We consider the quantum easy-plane Heisenberg magnet on the square lattice. After the introduction of a suitable classical effective Hamiltonian, computer simulations, both for ferro- and antiferromagnets, were performed to obtain the spin correlation lengths. The effects of quantum fluctuations are quantitatively evaluated and discussed for different values of the spin, in a broad range of temperatures, above the Berezinskii-Kosterlitz-Thouless transition. (C) 1998 Published by Elsevier Science B.V.

引用

页码：68 / 72

页数：5

共 20 条

[1]

[Anonymous], MAGNETIC EXCITATIONS

[2]

Berezinskii V. L., 1970, Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki, V59, P907

[3] Quantum correction to the BKT transition for 2D easy-plane antiferromagnets [J].