Noise and superconducting transition in self-heated tunnel junctions

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00685775· OSTI ID:5655955

Will, T A; Adler, J G

Distinctive structure in the tunneling characteristics of junctions having a superconducting electrode arises at a bias V/sub 0/ where junction dissipation is sufficient to drive the electrode normal. While details of this structure are dependent upon junction-bath thermal linkage, in all cases a marked increase of junction conductance sigma(V) = dI/dV occurs at V/sub 0/ and this increase reflects an excess current at the superconducting-normal phase transition. In the case of Pb electrode junctions the transition in both normal and superfluid He occurs when junction dissipation triggers film boiling in the liquid. We discuss phase transition-induced tunneling structure, junction noise, and excess current for Pb electrode junctions in different thermal environments and consider the implications for tunneling spectroscopy and Josephson device applications.

• Research Organization: Department of Physics, University of Alberta, Edmonton, Alberta, Canada
• OSTI ID: 5655955
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 53:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BOILING
CHALCOGENIDES
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUCTUATIONS
FLUIDS
GASES
HEATING
HELIUM
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD
LIQUIDS
MAGNESIUM
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
NOISE
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE GASES
SPECTROSCOPY
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT
ULTRALOW TEMPERATURE
VARIATIONS