Phys. Rev. Lett. 86, 890–893 (2001)Giant Enhancement of the Thermal Hall Conductivity κxy in the Superconductor YBa2Cu3O7Received 1 June 2000; published in the issue dated 29 January 2001 In high-purity YBa2Cu3O7, the (weak-field) thermal Hall conductivity κxy is observed to increase a thousand-fold between 90 and 30 K. The inferred quasiparticle lifetime τ increases a hundred-fold starting below 90 K, in disagreement with a recent photoemission experiment. We show that κxy exhibits a specific scaling behavior below ∼30K. This scaling may bear on the issue of whether Landau quantization of the quasiparticle states occurs. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.890
DOI:
10.1103/PhysRevLett.86.890
PACS:
74.72.Bk, 72.15.Eb, 72.15.Lh, 74.25.Fy
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