Magnon Heat Conductivity and Mean Free Paths in Two-Leg Spin Ladders: A Model-Independent Determination

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dc.creatorHess, C.
dc.creatorRibeiro, P.
dc.creatorBüchner, B.
dc.creatorElHaes, H.
dc.creatorRoth, G.
dc.creatorAmmerahl, U.
dc.creatorRevcolevschi, A.
dc.date2005-06-23
dc.date2006-03-17
dc.date.accessioned2026-07-07T06:38:01Z
dc.date.available2026-07-07T06:38:01Z
dc.descriptionThe magnon thermal conductivity $κ_{\mathrm{mag}}$ of the spin ladders in $\rm Sr_{14}Cu_{24-x}Zn_xO_{41}$ has been investigated at low doping levels $x=0$, 0.125, 0.25, 0.5 and 0.75. The Zn-impurities generate nonmagnetic defects which define an upper limit for $l_{\mathrm{mag}}$ and therefore allow a clear-cut relation between $l_{\mathrm{mag}}$ and $κ_{\mathrm{mag}}$ to be established independently of any model. Over a large temperature range we observe a progressive suppression of $κ_{\mathrm{mag}}$ with increasing Zn-content and find in particular that with respect to pure $\rm Sr_{14}Cu_{24}O_{41}$ $κ_{\mathrm{mag}}$ is strongly suppressed even in the case of tiny impurity densities where $l_{\mathrm{mag}}\lesssim 374$~Å. This shows unambiguously that large $l_{\mathrm{mag}}\approx 3000$~Å which have been reported for $\rm Sr_{14}Cu_{24}O_{41}$ and $\rm La_{5}Ca_9Cu_{24}O_{41}$ on basis of a kinetic model are in the correct order of magnitude.
dc.identifierhttps://arxiv.org/abs/cond-mat/0506595
dc.identifierhttp://arxiv.org/abs/cond-mat/0506595
dc.identifierPhys. Rev. B 73, 104407 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.104407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100594
dc.subjectStrongly Correlated Electrons
dc.subjectOther Condensed Matter
dc.titleMagnon Heat Conductivity and Mean Free Paths in Two-Leg Spin Ladders: A Model-Independent Determination
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