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Propagation of thermal excitations in a cluster of vortices in superfluid 3He-B

By J. J. Hosio, V. B. Eltsov, R. de Graaf, M. Krusius, J. Mäkinen and D. Schmoranzer

Abstract

We describe the first measurement on Andreev scattering of thermal excitations from a vortex configuration with known density, spatial extent, and orientations in 3He-B superfluid. The heat flow from a blackbody radiator in equilibrium rotation at constant angular velocity is measured with two quartz tuning fork oscillators. One oscillator creates a controllable density of excitations at 0.2Tc base temperature and the other records the thermal response. The results are compared to numerical calculations of ballistic propagation of thermal quasiparticles through a cluster of rectilinear vortices.Comment: 6 pages, 4 figure

Topics: Condensed Matter - Other Condensed Matter, Condensed Matter - Superconductivity
Year: 2011
DOI identifier: 10.1103/PhysRevB.84.224501
OAI identifier: oai:arXiv.org:1103.2633
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