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The thermal conductivity of superfluid He-3 in aerogel: a measurement of the energy gap.

Fisher, Shaun N. and Guénault, A.M. and Hale, A. J. and Pickett, George R. (2002) The thermal conductivity of superfluid He-3 in aerogel: a measurement of the energy gap. Journal of Low Temperature Physics, 126 (1-2). pp. 673-678. ISSN 0022-2291

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Abstract

Transport properties of superfluid He-3 in aerogel are governed by a fixed paean free path set by the typical dimensions of the strand separation. We describe preliminary measurements of the thermal conductivity of superfluid He-3 confined in 98% silica aerogel. The majority of the measurements are made in relatively high magnetic fields where the superfluid within the aerogel is in the A-phase like state. Since the quasiparticle mean free path is fixed, the temperature dependence of the thermal conductivity depends only on the superfluid energy gap and on the texture in the case of the A-phase. The results so far obtained are broadly consistent with the aerogel-confined superfluid having a temperature dependent energy gap close to the BCS prediction although there are significant deviations at the lowest temperatures.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: helium-3 ; superfluid ; aerogel ; thermal conductivity
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23571
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 16:30
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23571

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