Evidence for a large magnetic heat current in insulating cuprates

M. Hofmann; T. Lorenz; K. Berggold; M. Gr"uninger; A. Freimuth; G. S. Uhrig; E. Br"uck

doi:10.1103/PhysRevB.67.184502

Evidence for a large magnetic heat current in insulating cuprates

Strongly Correlated Electrons 2009-11-10 v1

Authors: M. Hofmann , T. Lorenz , K. Berggold , M. Gr"uninger , A. Freimuth , G. S. Uhrig , E. Br"uck

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Abstract

The in-plane thermal conductivity $k$ of the two-dimensional antiferromagnetic monolayer cuprate Sr $_2$ CuO $_2$ Cl $_2$ is studied. Analysis of the unusual temperature dependence of $k$ reveals that at low temperatures the heat is carried by phonons, whereas at high temperatures magnetic excitations contribute significantly. Comparison with other insulating layered cuprates suggests that a large magnetic contribution to the thermal conductivity is an intrinsic property of these materials.

Keywords

thermal conductivity magnetic heat current insulating cuprates antiferromagnetic phonons magnetic excitations Sr2CuO2Cl2

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@article{arxiv.cond-mat/0301093,
  title  = {Evidence for a large magnetic heat current in insulating cuprates},
  author = {M. Hofmann and T. Lorenz and K. Berggold and M. Gr"uninger and A. Freimuth and G. S. Uhrig and E. Br"uck},
  journal= {arXiv preprint arXiv:cond-mat/0301093},
  year   = {2009}
}

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4 pages, 2 figures included, submitted to Phys. Rev. B

Evidence for a large magnetic heat current in insulating cuprates

Abstract

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