Low-temperature spin transport in a S=1 one-dimensional antiferromagnet

被引：25

作者：

Pires, A. S. T. ^{[1
]}

Lima, L. S. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 24期

关键词：

NONLINEAR SIGMA-MODEL; HEISENBERG MODELS; RAMAN-SCATTERING; DYNAMICS; DIFFUSION; STIFFNESS;

D O I：

10.1088/0953-8984/21/24/245502

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

eWe study spin transport in the insulating antiferromagnet with S = 1 in one dimension. The spin conductivity is calculated, at zero temperature, using a modified spin wave theory and the Kubo formalism, within the ladder approximation. Two-magnon processes provide the dominant contribution to the spin conductivity. At finite temperature, free magnons are activated, and turn the system into a perfect spin conductor, i.e., the spin conductivity has a Drude form with infinite scattering time.

引用

页数：5

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