Magnetic field dependence of the superconductor-normal-metal boundary resistance
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), Vol. 21:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH ALLOYS
ELECTRIC CONDUCTIVITY
CADMIUM
LEAD BASE ALLOYS
SUPERCONDUCTING JUNCTIONS
CRITICAL CURRENT
FERMI LEVEL
INTERFACES
MAGNETIC FIELDS
TRANSITION TEMPERATURE
TUNNEL EFFECT
TYPE-II SUPERCONDUCTORS
ALLOYS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY LEVELS
LEAD ALLOYS
METALS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
420201* - Engineering- Cryogenic Equipment & Devices
360104 - Metals & Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)