Theoretical investigation of Josephson tunnel junctions with spatially inhomogeneous superconducting electrodes

Journal Article · Fri Jan 01 04:00:00 EST 1988 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683247· OSTI ID:6925843

Golubov, A A; Kupriyanov, M Yu

The microscopic theory of the Josephson effect in tunnel structures with electrodes having spatially inhomogeneous superconducting properties is formulated. Two mechanisms of inhomogeneity are considered. The first is associated with the presence of a thin transition normal layer located near the tunnel barrier, which is relevant for junctions based on refractory superconductors. The second case is the trapping of Abrikosov vortices by junction electrodes. The tunnel current components are calculated numerically in the whole temperature range O < T < T/sub c/ and magnetic field range O < H < H/sub c2/. It is shown that the tunnel current is extremely sensitive to the type of smearing of the singularities of the classical tunnel theory at eV = 2..delta... The results allow experimental determination of the characteristics of real tunnel junctions.

• Research Organization: Institute of Solid State Physics, Moscow (USSR)
• OSTI ID: 6925843
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 70:1-2; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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360204 -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CHALCOGENIDES
COHERENCE LENGTH
CRITICAL CURRENT
CRITICAL FIELD
CURRENTS
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRODES
ELEMENTS
ENERGY DENSITY
FILMS
FUNCTIONS
GREEN FUNCTION
INHOMOGENEOUS FIELDS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
LENGTH
MAGNETIC FIELDS
MAGNETIC FLUX
MATHEMATICAL MODELS
METALS
NIOBIUM
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NIOBIUM OXIDES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
TUNNEL EFFECT