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Quasiparticle transport in the vortex state of YBa_2Cu_3O_6.9

May Chiao·R. W. Hill·Christian Lupien·Bojana Popic·Robert Gagnon·Louis Taillefer
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Abstract

The effect of vortices on quasiparticle transport in cuprate superconductors was investigated by measuring the low temperature thermal conductivity of YBa_2Cu_3O_6.9 in magnetic fields up to 8 T. The residual linear term (as T \to 0) is found to increase with field, directly reflecting the occupation of extended quasiparticle states. A study for different Zn impurity concentrations reveals a good agreement with recent calculations for a d-wave superconductor, thereby shedding light on the nature of scattering by both impurities and vortices. It also provides a quantitative measure of the gap near the nodes.

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May Chiao, R. W. Hill, Christian Lupien, Bojana Popic, Robert Gagnon, Louis Taillefer. 1999-03-25. Quasiparticle transport in the vortex state of YBa_2Cu_3O_6.9. https://doi.org/10.1103/physrevlett.82.2943

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