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arXiv:cond-mat/0304629 · Physical Review Letters

High Temperature Thermal Conductivity of Two-Leg Spin- 1/2 Ladders

X. Zotos

Published Feb 13, 2004• 70 citations
arXivHTMLPDF

Abstract

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.

DOI
10.1103/physrevlett.92.067202

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