Spin thermal conductivity of the Haldane chain compound Y2BaNiO5

Preprint

15 August 2006

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0603586

Abstract

We have measured the thermal conductivity of the spin S=1 chain compound Y2BaNiO5. Analyzing the anisotropy of the thermal transport allows to identify a definite spin-mediated thermal conductivity \kappa_s along the chain direction. The calculated spin-related energy diffusion constant D_E(T) shows a broad peak around 120 K. Close to room temperature, D_E(T) approaches the theoretically predicted high-temperature value, while scattering of spin excitations by magnetic impurities seems to be the major limiting factor of \kappa_s at low temperature.

Keywords

CHAIN COMPOUND Y2BANIO5
THERMAL CONDUCTIVITY
HALDANE CHAIN
SPIN THERMAL
TEMPERATURE

All Related Versions

Version 1, 2006-03-22, ArXiv
Version 2, 2006-08-15, ArXiv
Published version: Physical Review Letters, 97 (11), 115901.

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