Identification of the ±s-wave pairing state in iron-pnictide superconductors using the Riedel anomaly
Daisuke Inotani, Yoji Ohashi
DOI 10.1103/PhysRevB.79.224527 · Physical Review B
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Abstract
We theoretically propose a method to identify ±s-wave order parameter in recently discovered Fe-pnictide superconductors. Our idea uses the Riedel anomaly in ac-Josephson current through a SI(±S) (single-band s-wave superconductor/insulator/±s-wave two-band superconductor) junction. We show that the Riedel peak effect leads to vanishing ac-Josephson current at some values of biased voltage. This phenomenon does not occur in the case when the ±s-wave superconductor is replaced by a conventional s-wave one so that the observation of this vanishing Josephson current would be a clear signature of ±s-wave pairing state in Fe-pnictide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 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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