Current distributions of thermal switching in extremely underdamped Josephson junctions
- 1 February 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (4), 1525-1531
- https://doi.org/10.1103/physrevb.37.1525
Abstract
The first measurements of the switching current distribution of an extremely underdamped Josephson junction are presented at various temperatures. Careful fitting of the data provides an experimental verification of the thermal activation theory in the very low damping limit. Moreover, the fitting allows us to obtain the ‘‘effective’’ resistance of a Josephson tunnel junction, thus providing an important indication as to the proper junction resistance to be used in the resistively shunted junction model. These values of junction resistance show the temperature dependence of a subgap resistance, i.e., exp(Δ/T), due to activation of quasiparticles over the superconductor energy gap Δ.
Keywords
This publication has 34 references indexed in Scilit:
- Supercurrent decay in underdamped Josephson junctions: Nonstationary caseJournal of Applied Physics, 1985
- Escape-energy distribution for particles in an extremely underdamped potential wellPhysical Review B, 1984
- Thermal activation in extremely underdamped Josephson-junction circuitsPhysical Review B, 1983
- Theory of Activated Rate Processes: Bridging between the Kramers LimitsPhysical Review Letters, 1983
- Bistability effects of the brownian motion in periodic potentialsZeitschrift für Physik B Condensed Matter, 1980
- Numerical Brownian-motion model reaction ratesPhysical Review B, 1976
- Escape rate for a Brownian particle in a potential WellPhysical Review B, 1976
- Intrinsic Fluctuations in a Superconducting Ring Closed with a Josephson JunctionPhysical Review B, 1972
- Effect of Noise on the Current-Voltage Characteristics of a Josephson JunctionJournal of Applied Physics, 1971
- Voltage Due to Thermal Noise in the dc Josephson EffectPhysical Review Letters, 1969