Peculiar properties of the Josephson junction at the transition from 0 to π state
A. Buzdin
DOI 10.1103/PhysRevB.72.100501 · Physical Review B
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Abstract
It is demonstrated that in the diffusive superconductor-ferromagnet-superconductor (S/F/S) junctions the current-phase relation is practically sinusoidal everywhere except in a narrow region near the 0–π transition. In this region the second harmonic dominates the scenario of the 0–π transition. We predict a first-order transition for the S/F/S junctions with a homogeneous F barrier. However, in real junctions a small modulation of the thickness of the barrier may favor the continuous 0–π transition and the realization of the Josephson junction with an arbitrary ground-state phase difference. The performed calculations of the second-harmonic amplitude provide a natural explanation of the recent contradictory results on the second-harmonic measurements.
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| 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. | — | Pressure not reported | unknown |
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