Paraconductivity of three-dimensional amorphous superconductors: evidence for a short-wavelength cutoff in the fluctuation spectrum
Measurements of the temperature dependence and magnetic-field dependence of the paraconductivity of a three-dimensional amorphous superconductor are presented. The data are analyzed in terms of several current theories and are found to give good agreement for low fields and temperatures near T/sub c/. Strong pair-breaking effects due to thermal phonons are believed to account for the observed absence of anomalous Marki-Thompson contributions to the paraconductivity. The paraconductivity falls well below predicted theoretical values in the high-temperature and high-field limits. This is attributed to the reduced role of high-wave-vector contributions to the paraconductivity. It is shown that the introduction of a short-wavelength cutoff in the theoretical fluctuation spectrum provides a phenomenological account of the discrepancy between theory and experiment.
- Research Organization:
- W. M.,Keck Laboratory of Engineering Materials, California of Technology, Pasadena, California 91125
- OSTI ID:
- 5005262
- Journal Information:
- Phys. Rev., B; (United States), Vol. 17:7
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
RHODIUM ALLOYS
ELECTRICAL PROPERTIES
TRANSITION TEMPERATURE
ZIRCONIUM BASE ALLOYS
GOLD ALLOYS
LANTHANUM BASE ALLOYS
AMORPHOUS STATE
BINARY ALLOY SYSTEMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
ALLOY SYSTEMS
ALLOYS
LANTHANUM ALLOYS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
THERMODYNAMIC PROPERTIES
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