A DETERMINATION OF THE LOW-ENERGY PARAMETERS OF THE 2-D HEISENBERG-ANTIFERROMAGNET

被引：155

作者：

WIESE, UJ ^{[1
]}

YING, HP ^{[1
]}

机构：

[1] ZHEJIANG UNIV, ZHEJIANG INST MODERN PHYS, HANGZHOU 310027, PEOPLES R CHINA

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1994年 / 93卷 / 02期

关键词：

02.50.N; 74.20; 75.50.E;

D O I：

10.1007/BF01316955

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We perform numerical simulations of the 2-d Heisenberg antiferromagnet using a cluster algorithm. Comparing the size and temperature effects of various quantities with results from chiral perturbation theory we determine the low energy parameters of the system very precisely. We find e(0)=-0.6693(1)J/a(2) for the ground state energy density, M(s)=0.3074(4)/a(2) for the staggered magnetization, hc=1.68(1)Ja for the spin wave velocity and p(s)=0.186(4)J for the spin stiffness. Our results agree with experimental data for the precursor insulators of high-T-c, superconductors.

引用

页码：147 / 150

页数：4

共 17 条

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