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VOLUME 88, NUMBER 9 P H Y S I C A L R E V I E W L E T T E R S 4 MARCH 2002 Singularity in the Thermal Boundary Resistance between Superfluid 4He and a Solid Surface
 

Summary: VOLUME 88, NUMBER 9 P H Y S I C A L R E V I E W L E T T E R S 4 MARCH 2002
Singularity in the Thermal Boundary Resistance between Superfluid 4He and a Solid Surface
Kerry Kuehn,1 Sarabjit Mehta,1 Haiying Fu,1 Edgar Genio,1 Daniel Murphy,1 Fengchuan Liu,2
Yuanming Liu,2 and Guenter Ahlers1
1
Department of Physics and iQUEST, University of California, Santa Barbara, California 93106
2
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
(Received 1 August 2001; published 14 February 2002)
We report new measurements in four cells of the thermal boundary resistance R between copper and
4
He below but near the superfluid-transition temperature Tl. For 1027
# t 1 2 T Tl # 1024
fits
of R R0t2xb 1 RB to the data yielded xb 0.18, whereas a fit to theoretical values based on the
renormalization-group theory yielded xb 0.23. Alternatively, a good fit of the theory to the data could
be obtained if the amplitude of the prediction was reduced by a factor close to 2. The results raise the
question whether the boundary conditions used in the theory should be modified.
DOI: 10.1103/PhysRevLett.88.095702 PACS numbers: 64.60.Ht, 67.40.Pm, 68.35.Rh
An important, as yet unresolved, issue in condensed-

  

Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara

 

Collections: Physics