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.
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页数：4
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