Current-voltage characteristics of superconducting weak links in the high current regime
The current-voltage (I-V) characteristics of tin and niobium weak links with a variable-thickness, Dayem-bridge geometry have been studied in the realm of high current-bias. The observation of structure appearing in the dc I-V curve was conducted as a function of temperature, externally applied microwave radiation, and magnetic field. A computer-based data acquisition and control system was created to operate in conjunction with the high-sensitivity analog instrumentation utilized to perform these measurements. Software that was suitable for use in several low-temperature experiments was developed for real-time, computer-aided data collection and analysis. The microbridges that were studied all exhibited the classical dc and ac Josephson effects. In addition, at high current-bias, several classifications of structure were found in the I-V characteristics of these bridges.
- Research Organization:
- Virginia Univ., Charlottesville (USA)
- OSTI ID:
- 6203517
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DATA
ELECTRIC BRIDGES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
METALS
MICROWAVE RADIATION
NIOBIUM
NUMERICAL DATA
PHYSICAL PROPERTIES
RADIATIONS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TIN
TRANSITION ELEMENTS