Magnetic field dependence of the superconductor-normal-metal boundary resistance

Journal Article · Fri Feb 01 04:00:00 EST 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.21.956· OSTI ID:5689106

Hsiang, T Y

The superconductor-normal-metal boundary resistance between Pb/sub 0.98/Bi/sub 0.02/ and Cd was measured as a function of magnetic field. Using the theory of Hsiang and Clarke, we deduce the electron-phonon inelastic scattering time tau/sub E/=0(T/sub c/) for quasiparticles on the Fermi surface and at T/sub c/ to be (3.5 +- 0.7) x 10/sup -11/ s in the absence of magnetic fields. When a magnetic field is applied in the plane of the junction, the boundary resistance at a fixed reduced temperature T/T/sub c/(H) was found to decrease with increasing field. This effect is ascribed to the pair breaking of the magnetic field in a type-II superconductor. Using a pair-breaking parameter ..cap alpha..=DeH/c, where D is the electronic diffusivity determined from resistivity measurement, and a charge relaxation time calculated by Schmid and Schoen, we quantitatively account for the magnetic field dependence of the boundary resistance.

• Research Organization: Ames Laboratory, United States Department of Energy and Department of Physics, Iowa State University, Ames, Iowa 50011
• OSTI ID: 5689106
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 21:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
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MAGNETIC FIELDS
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TYPE-II SUPERCONDUCTORS