Multiple Andreev reflections in weak links of superfluid {sup 3}He-B

Journal Article · Tue Feb 01 04:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.71.064509· OSTI ID:20665125

Viljas, J K ^[1]

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1. Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT (Finland)

We calculate the current-pressure characteristics of a ballistic pinhole aperture between two volumes of B-phase superfluid {sup 3}He. The most important mechanism contributing to dissipative currents in weak links of this type is the process of multiple Andreev reflections. At low biases this process is significantly affected by relaxation due to inelastic quasiparticle-quasiparticle collisions. In the numerical calculations, suppression of the superfluid order parameter at surfaces is taken into account self-consistently. When this effect is neglected, the theory may be developed analytically like in the case of s-wave superconductors. A comparison with experimental results is presented.

• OSTI ID: 20665125
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 6 Vol. 71; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLLISIONS
COMPARATIVE EVALUATIONS
HELIUM 3
ORDER PARAMETERS
QUASI PARTICLES
REFLECTION
S WAVES
SUPERCONDUCTORS
SUPERFLUIDITY
SURFACES