Magnon heat transport in doped La2CuO4 -: art. no. 197002

被引：90

作者：

Hess, C ^{[1
]}

Büchner, B

Ammerahl, U

Colonescu, L

Heidrich-Meisner, F

Brenig, W

Revcolevschi, A

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany

[2] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[3] Tech Univ Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany

[4] Univ Paris 11, Lab Physicochim, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.90.197002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present results of the thermal conductivity of La2CuO4 and La1.8Eu0.2CuO4 single crystals which represent model systems for the two-dimensional spin-1/2 Heisenberg antiferromagnet on a square lattice. We find large anisotropies of the thermal conductivity which are explained in terms of two-dimensional heat conduction by magnons within the CuO2 planes. Nonmagnetic Zn substituted for Cu gradually suppresses this magnon thermal conductivity kappa(mag). A semiclassical analysis of kappa(mag) is shown to yield a magnon mean free path which scales linearly with the reciprocal concentration of Zn ions.

引用

页数：4

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