Effect of Josephson medium under tunneling in Bi-Sr-Ca-Cu-O
- Donetsk Physico-Technical Inst., Ukrainian Academy of Science, 72, Luxemburg, Str., Donetsk-114, 340114, Ukraine (USSR)
This paper discusses tunneling characteristics of high-T[sub c] oxide superconductor Bi-Sr-Ca-Cu-O which have been measured in the wide bias voltage and temperature range. Near zero bias voltage tunneling conductivity [sigma](U) is expressed by the U[sup 1/2] at low temperature, which goes to the linear one at U [gt] 100 mV. Background conductivity metaloxide is determined by Shottky barrier on surface high-T[sub c]. It has been found that the peaks of [sigma](U) curves for low-ohmic contacts are well described theoretical model of destruction of superconductivity of the intergranular weak links. Parameters of these links are estimated. Zero bias anomaly conductivity peaks are explained by breakdown weak links with small critical current.
- OSTI ID:
- 6977293
- Journal Information:
- Modern Physics Letters B; (Singapore), Journal Name: Modern Physics Letters B; (Singapore) Vol. 6:22; ISSN 0217-9849; ISSN MPLBET
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BREAKDOWN
CALCIUM COMPOUNDS
COPPER COMPOUNDS
CRITICAL CURRENT
CUPRATES
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCHOTTKY EFFECT
STRONTIUM COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT