Andreev spectroscopy of LaFeAsO0.9F0.1
Ya. G. Ponomarev, S. A. Kuzmichev, M. G. Mikheev, M. V. Sudakova, S. N. Tchesnokov, O. S. Volkova, A. N. Vasiliev, T. Hänke, C. Hess, G. Behr, R. Klingeler, B. Büchner
DOI 10.1103/PhysRevB.79.224517 · Physical Review B
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Abstract
Current-voltage characteristics of Andreev contacts in LaFeAsO0.9F0.1 have been measured using the break-junction technique. The contacts were prepared at T=4.2 K from polycrystalline samples and exhibit superconductor/normal conductor/superconductor-type behavior due to multiple Andreev reflections. Two sets of subharmonic gap structures were detected indicating the existence of two distinct superconducting gaps: ΔL=(5.5±1) meV and ΔS=(1±0.2) meV.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO0.9F0.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 27.1 | Pressure not reported | unknown |
| LaFeAsO0.9F0.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28.1 | Pressure not reported | unknown |
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