Inhomogeneous Superconductivity Induced in a Ferromagnet by Proximity Effect
T. Kontos, M. Aprili, J. Lesueur, X. Grison
DOI 10.1103/PhysRevLett.86.304 · Physical Review Letters
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Abstract
Planar tunneling spectroscopy reveals damped oscillations of the superconducting order parameter induced into a ferromagnetic thin film by the proximity effect. The oscillations are due to the finite momentum transfer provided for Cooper pairs by the splitting of the spin-up and spin-down bands in the ferromagnet. As a consequence, for negative values of the superconducting order parameter the tunneling spectra are capsized (“ π state”). The oscillations' damping and period are set by the same length scale, which depends on the spin polarization.
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. | 8.8 | Pressure not reported | unknown |
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