Two-particle tunnelling between superconductors
- 1 June 1963
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 8 (90) , 1051-1061
- https://doi.org/10.1080/14786436308214463
Abstract
Excess currents have been observed in electron tunnelling between superconductors which cannot be explained on a model assuming the tunnelling of single particles. They take the form of a current step at applied voltages equal to half the energy gap of either superconductor, followed by an exponential-like rise in current. The size of the step varies greatly between samples and is sometimes too small to detect, but it is typically 10−4 of the current in the normal state at the same voltage. The excess currents are attributed to processes in which two particles tunnel simultaneously through the insulating barrier (Schrieffer and Wilkins 1963). The conditions for the occurrence of the various tunnelling processes are examined, and higher-order processes are discussed.Keywords
This publication has 6 references indexed in Scilit:
- Probable Observation of the Josephson Superconducting Tunneling EffectPhysical Review Letters, 1963
- Excess Currents in Electron Tunneling Between SuperconductorsPhysical Review Letters, 1963
- Two-Particle Tunneling Processes Between SuperconductorsPhysical Review Letters, 1963
- Possible new effects in superconductive tunnellingPhysics Letters, 1962
- Study of Superconductors by Electron TunnelingPhysical Review B, 1961
- Tunneling Through Thin Insulating LayersJournal of Applied Physics, 1961