Self‐resonant modes in Nb‐NbOx‐Pb Josephson junctions

  title={Self‐resonant modes in Nb‐NbOx‐Pb Josephson junctions},
  author={Gianfranco Patern{\`o} and James E. Nordman},
  journal={Journal of Applied Physics},
Measurements of the magnetic field dependence of Fiske steps and ’’zero‐field’’ steps in Nb–Nb oxide–Pb Josephson junctions are described. By the use of a simple variable dc bias scheme, the measured ac volt‐ampere characteristics are made to clearly exhibit the step structure even in the presence of a large dc Josephson current. A comparison with the theory of Kulik for the magnetic field dependence of Fiske steps is shown and the correlation is very good for small L/λj ratios. Deviations for… 
15 Citations
Self‐resonant current steps of Josephson tunnel junctions in the presence of multimode oscillation
Taking into account the presence of multimode oscillation, self‐resonant current steps in current‐voltage characteristics of rectangular Josephson tunnel junctions are studied theoretically. An
Resonant modes in Nb baselayer interferometers with two Josephson junctions
Resonances in the current‐voltage characteristics of interferometers with two Nb‐NbOx‐Pb window junctions have been experimentally investigated. The data are compared with the theoretical curves
Field dependence of Fiske resonances in Nb-AlO/sub x/ based Josephson junctions
Fiske resonances have been measured in a rectangular Nb-Al, AlO/sub x/, Al-Nb Josephson junction as a function of the magnetic field applied parallel to a junction side. Due to the high quality
Phase periodic conductance oscillations at subgap Andreev resonances in Nb–Al–AlOx–Al–Nb tunnel junctions
We show evidence of a magnetic field dependent oscillation of subgap dynamic conductivity in a series of Nb–Al–AlOx–Al–Nb Josephson tunnel junctions in the voltage biased state. Our measurements show
Magnetic Field Effects in Josephson Junctions
  • J. Kirtley
  • Physics
    Fundamentals and Frontiers of the Josephson Effect
  • 2019
The chapter starts by describing Meissner screening and flux focusing in planar and nearly planar geometries, important for device applications. It then treats the Josephson effect in static magnetic
X-band radiation from Josephson junctions in magnetic field
Experimental measurements of current-voltage structure and emitted X-band radiation in applied magnetic field from overlap-geometry Josephson tunnel junctions of normalized length about 2 are
Properties of zero-field resonant modes in josephson junctions
The effect of an external magnetic field on zero-field resonances is investigated analytically. A calculation shows that the even-mode current height falls smoothly to zero as the external field
Josephson coupling and Fiske dynamics in ferromagnetic tunnel junctions
Abstract. We report on the fabrication of Nb/AlOx/Pd0.82Ni0.18/Nb superconductor/insulator/ferromagnetic metal/superconductor (SIFS) Josephson junctions with high critical current densities, large


dc and ac Josephson Effect in Sputtered Nb–NbOx–Pb Junctions
The magnetic field dependence of the maximum dc Josephson current and of the ac Josephson‐effect‐induced step structure have been measured for sputtered Nb–NbOx–Pb Josephson junctions, and found to
The magnetic‐field dependence of dc Josephson current IJ was measured using cross‐type square junctions made of Sn thin films. The results and analysis indicate that owing to the self‐field of IJ,
Temperature dependence of the maximum Josephson current for Nb−NbOx−Pb junctions
Measurements of the maximum Josephson current with temperature for Nb−NbOx−Pb junctions differ from the BCS Ambegaokar−Baratoff curve. This cannot be explained in terms of strong coupling effects. A
Field Solution for a Thin‐Film Superconducting Strip Transmission Line
By using Londons' equations, the two‐fluid model, and the classical skin effect for the normal component of the current, a sinusoidal wave solution is found for a superconducting transmission line.
The driven‐pendulum model for superconducting tunnel junctions, if solved using the true quasiparticle tunneling curve as the damping term, yields solutions for the observed hysteresis in the dc‐IV
Capacitance and ellipsometrically determined oxide thickness of Nb‐oxide‐Pb Josephson tunnel junctions
The capacitance of Nb‐oxide‐Pb Josephson tunnel junctions was determined from the self‐resonance phenomenon in the Josephson
Application of integrated circuit technology to the fabrication of large numbers of niobium based Josephson junctions
A batch fabrication technology is described for the production of small niobium based Josephson junctions. This technology uses thermally oxidized silicon wafers as substrates, allowing maximum usage
Observation of Cyclotron Resonance in Magnesium
We have observed Azbel-Kaner cyclotron resonances at 24 Gcps and 2°K in a single crystal of magnesium† with a residualresistance ratio of 8500. The normal to the specimen surface was within 1° of