Destruction of the Josephson effect by fluctuation

Journal Article · Tue Dec 01 04:00:00 EST 1987 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683333· OSTI ID:5614140

Fibich, M; Kuper, C G; Revzen, M; Ron, A

The authors use the fluctuation-dissipation theorem to calculate the fluctuation energy and the associated free energy both when the junction is phase-correlated and when it is uncorrelated. In these calculations, they use the resistively-shunted-junction model to describe the junction. By comparing the excess free energy in the correlated state (over the uncorrelated one) with the Josephson coupling energy, they find a thermodynamic criterion for destruction of the Josephson characteristic of the junction. In the limiting case where the shunt resistance has a finite zero-temperature limit, they find a nearly universal resistance threshold. In another limit, where the resistance is taken to be the frequency-independent tunneling resistance of the Bogoliubov quasiparticles (in a semiconductor picture), their criterion reduces to that of Anderson when the temperature T = 0. They predict that for some junction parameters, the system can be reentrant, while for some other values, the transition temperature may be lowered.

• Research Organization: Technion-Israel Institute of Technology, Haifa, Israel
• OSTI ID: 5614140
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 69:5-6; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOGOLYUBOV METHOD
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ENERGY
ENERGY GAP
EQUIVALENT CIRCUITS
FILMS
FLUCTUATIONS
FREE ENERGY
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
MATHEMATICAL MODELS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
QUASI PARTICLES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
VARIATIONS