Evidence for a large magnetic heat current in insulating cuprates

Details Evidence for a large magnetic heat current in insulating cuprates Evidence for a large magnetic heat current in insulating cuprates

2003-01-08

arxiv.org/abs/cond-mat/0301093v1

Phys. Rev. B 67, 184502 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevB.67.184502

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.

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