Special Condensed Matter Physics Seminar

Friday, November 19, 1999, 11 a.m.
Physics Building, Room 0405

Large enhancement of weak-field thermal Hall conductivity in YBCO

N. P. Ong

(Princeton University)

Abstract:  Recent measurements of the quasiparticle thermal Hall conductivity kxy in high-purity YBCO crystals reveal a very large enhancement of the weak-field value across Tc.  Between 90 and 30 K, the weak-field value of kxy increases by 1,000.  This extraordinary enhancement is consistent with a factor of 40-fold increase in the quasiparticle lifetime.  We will discuss the quasiparticle lifetime, Hall angle and the change in scattering as we cross Tc.

Host: Dennis Drew

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