SPIN CORRELATIONS OF 2D QUANTUM ANTIFERROMAGNET AT LOW-TEMPERATURES AND A DIRECT COMPARISON WITH NEUTRON-SCATTERING EXPERIMENTS

被引：104

作者：

DING, HQ ^{[1
]}

MAKIVIC, MS ^{[1
]}

机构：

[1] CALTECH,DEPT PHYS,PASADENA,CA 91125

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.64.1449

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Correlation functions of the spin-1/2 2D Heisenberg antiferromagnet at low temperatures are computed via a large-scale Monte Carlo simulation on 128×128 lattices. The correlation length is found to be accurately described by the exponentially divergent form typical of classical Heisenberg spins in two dimensions. The large correlation lengths measured are directly compared with the neutron-scattering experiments on La2CuO4. The excellent fit provides a first-principles determination of the exchange coupling: J=1450 30 K. © 1990 The American Physical Society.

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页码：1449 / 1452

页数：4

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