Superconducting phases and the second Josephson harmonic in tunnel junctions between diffusive superconductors
A. S. Osin, Ya. V. Fominov
Abstract
We consider a planar SIS-type Josephson junction between diffusive superconductors (S) through an insulating tunnel interface (I). We construct fully self-consistent perturbation theory with respect to the interface conductance. As a result, we find correction to the first Josephson harmonic and calculate the second Josephson harmonic. At arbitrary temperatures, we correct previous results for the nonsinusoidal current-phase relation in Josephson tunnel junctions, which were obtained with the help of conjectured form of solution. Our perturbation theory also describes the difference between the phases of the order parameter and of the anomalous Green functions.
Topics & Concepts
Josephson effectSuperconductivityPi Josephson junctionCondensed matter physicsPhysicsConductancePlanarSuperconducting tunnel junctionHarmonicPerturbation (astronomy)Tunnel junctionQuantum mechanicsQuantum tunnellingComputer scienceComputer graphics (images)Physics of Superconductivity and MagnetismQuantum and electron transport phenomenaIron-based superconductors research