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Updated: Jul 4, 2026

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
Field-dependent thermal transport in the haldane chain compound NENP
A V Sologubenko1, T Lorenz, J A Mydosh
1II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany.
Abstract:
We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C(2)H(8)N(2))(2)NO(2)(ClO(4)) (NENP). The measured thermal conductivity is found to be very sensitive to the field-induced changes in the spin excitation spectrum. The magnetic contribution to the total heat conductivity is analyzed in terms of a quasiparticle model, and we obtain a temperature and momentum independent mean free path. This implies that the motion of quasiparticles is effectively three dimensional despite the tiny interchain coupling.
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