Optical Study of LaO0.9F0.1FeAs: Evidence for a Weakly Coupled Superconducting State
S.-L. Drechsler, M. Grobosch, K. Koepernik, G. Behr, A. Köhler, J. Werner, A. Kondrat, N. Leps, C. Hess, R. Klingeler, R. Schuster, B. Büchner, M. Knupfer
DOI 10.1103/PhysRevLett.101.257004 · Physical Review Letters
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Abstract
We have studied the reflectance of the recently discovered superconductor LaO0.9F0.1FeAs in a wide energy range from the far infrared to the visible regime. We report on the observation of infrared active phonons, the plasma edge, and possible interband transitions. On the basis of this data and the reported in-plane penetration depth λL(0)=254 nm [H. Luetkens et al., Phys. Rev. Lett. 101, 097009 (2008)] a disorder sensitive relatively small value of the total electron-boson coupling constant λtot=λe−ph+λe−sp∼0.6±0.35 can be estimated adopting an effective single-band picture.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaO0.9F0.1FeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26.8 | Pressure not reported | unknown |
| LaO0.9F0.1FeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26.8 | Pressure not reported | unknown |
| LaO1-xFxFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 43 | Pressure not reported | onset |
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