title: Giant enhancement of the thermal Hall conductivity kappa(xy) in the superconductor YBa(2)Cu(3)O(7).
abstract: In high-purity YBa(2)Cu(3)O(7), the (weak-field) thermal Hall conductivity kappa(xy) is observed to increase a thousand-fold between 90 and 30 K. The inferred quasiparticle lifetime tau increases a hundred-fold starting below 90 K, in disagreement with a recent photoemission experiment. We show that kappa(xy) exhibits a specific scaling behavior below approximately 30 K. This scaling may bear on the issue of whether Landau quantization of the quasiparticle states occurs.
authors.affiliation: Joseph Henry Laboratories of Physics, Princeton University, New Jersey 08544, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: N P
authors.initials: NP
authors.lastname: Ong
authors.forename: P W
authors.initials: PW
authors.lastname: Anderson
authors.forename: D A
authors.initials: DA
authors.lastname: Bonn
authors.forename: R
authors.initials: R
authors.lastname: Liang
authors.forename: W N
authors.initials: WN
authors.lastname: Hardy