Giant enhancement of the thermal Hall conductivity kappa(xy) in the superconductor YBa(2)Cu(3)O(7).
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.
Zhang
Y
Y
Joseph Henry Laboratories of Physics, Princeton University, New Jersey 08544, USA.
Ong
N P
NP
Anderson
P W
PW
Bonn
D A
DA
Liang
R
R
Hardy
W N
WN