High temperature thermal conductivity of two-leg spin-1/2 ladders

被引：65
|
作者：
Zotos, X [1 ]
机构：
[1] PHB Ecublens, Inst Romand Rech Numer Phys Mat, CH-1015 Lausanne, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.92.067202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Based on numerical simulations, a study of the high temperature, finite frequency, thermal conductivity kappa(omega) of spin-1/2 ladders is presented. The exact diagonalization and a novel Lanczos technique are employed. The conductivity spectra, analyzed as a function of rung coupling, point to a nondiverging dc limit but to an unconventional low frequency behavior. The results are discussed in perspective with recent experiments indicating a significant magnetic contribution to the energy transport in quasi-one-dimensional compounds.
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页数：4
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