Gapless superconductivity in ferromagnet/superconductor junctions
Guoya Sun, D. Y. Xing, Jinming Dong, Mei Liu
DOI 10.1103/PhysRevB.65.174508 · Physical Review B
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Abstract
The Nambu spinor Green’s function approach is applied to study the proximity effect in ferromagnet/superconductor (FM/SC) junctions. It is found that gapless superconductivity appears in both FM and SC regions near the FM/SC interface. In FM the superconducting order parameter induced by the proximity effect displays a damped oscillation. When the distance from the interface increased, following a transition from the “0 state” to the “π state,” the induced superconducting density of states in FM is flipped with respect to the normal state. Quantitative agreement is obtained between the calculated results and recent tunneling spectra in Al/Al2O3/PbNi/Nb tunnel junctions. In particular, peak and dip behavior of the induced superconducting DOS in FM is well reproduced.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| 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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