0 and π phase Josephson coupling through an insulating barrier with magnetic impurities
O. Vávra, S. Gaži, D. S. Golubović, I. Vávra, J. Dérer, J. Verbeeck, G. Van Tendeloo, V. V. Moshchalkov
DOI 10.1103/PhysRevB.74.020502 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have studied the temperature and field dependencies of the critical current IC in the Nb−Fe0.1Si0.9−Nb Josephson junction with a tunneling barrier formed by a paramagnetic insulator. We demonstrate that in these junctions coexistence of both the 0 and the π states within one tunnel junction occurs, and leads to the appearance of a sharp cusp in the temperature dependence IC(T), similar to the IC(T) cusp found for the 0−π transition in metallic π junctions. This cusp is not related to the 0−π temperature-induced transition itself, but is caused by the different temperature dependencies of the opposing 0 and π supercurrents through the barrier.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | onset |
Similar papers
Interference between magnetic field and cavity modes in an extended Josephson junction
similarity 0.95V. Humbert et al.
Source status unknown — claims are unverified
Josephson Junction through a Thin Ferromagnetic Layer: Negative Coupling
similarity 0.95T. Kontos et al.
Source status unknown — claims are unverified
Electrodynamics of Josephson junctions containing strong ferromagnets
similarity 0.95D. Massarotti et al.
Source status unknown — claims are unverified
Nonequilibrium ac Josephson Effect in Mesoscopic Nb-InAs-Nb Junctions
similarity 0.95K. W. Lehnert et al.
Source status unknown — claims are unverified
Resonant Josephson tunneling in S−I−S′-I-S multilayered devices
similarity 0.94I. P. Nevirkovets & S. E. Shafranjuk
Source status unknown — claims are unverified
Josephson Junctions with Artificial Superparamagnetic Barrier: A Promising Avenue for Nanoscale Magnetometry
similarity 0.94Ivan P. Nevirkovets et al.
Source status unknown — claims are unverified