Skip to content

Quasiparticle transport in the vortex state of YBa2Cu3O6.9

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

cond-mat.supr-conarXiv:cond-mat/9810323

Abstract

The effect of vortices on quasiparticle transport in cuprate superconductors was investigated by measuring the low temperature thermal conductivity of YBa2Cu3O6.9 in magnetic fields up to 8 T. The residual linear term (as T 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.

Create a lesson