Correlation lengths in quantum spin ladders

被引：23

作者：

Syljuasen, OF ^{[1
]}

Chakravarty, S ^{[1
]}

Greven, M ^{[1
]}

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.78.4115

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Analytic expressions for the temperature dependences of the correlation length are given for antiferromagnetic spin-1/2 Heisenberg ladders using a finite-size nonlinear sigma model approach. These calculations rely on identifying three successive crossover regimes as a function of temperature. Tn each of these regimes, precise and controlled approximations are formulated. The analytical results are found to be in excellent agreement with Monte Carlo simulations for the Heisenberg Hamiltonian.

引用

页码：4115 / 4118

页数：4

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