Nonlinearity in the Kapitza Resistance between Gold and Superfluid 4He Near Tλ
- 1 January 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (S3-1)
- https://doi.org/10.7567/jjaps.26s3.363
Abstract
We report experimental results for the thermal boundary resistance RK between gold and superfluid 4He which were obtained by using thermometry with three-nanokelvin resolution. The data imply that RK is singular at the superfluid transition temperature Tλ. For t≡1-T/Tλ\lesssim10-4, RK becomes noticeably dependent on the heat flux Q used to make the measurement. The reduced temperature tc at which this nonlinear resistance is first observed is approximately proportional to Q. For t≤tc dRK/dQ is approximately proportional to 1/t.Keywords
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