Far-infrared probe of superconductivity in SmO$_{1-x}$F$_{x}$FeAs}

Details Far-infrared probe of superconductivity in SmO$_{1-x}$F$_{x}$FeAs} Far-infrared probe of superconductivity in SmO$_{1-x}$F$_{x}$FeAs}

2008-06-13

arxiv.org/abs/0806.2303v1

Physics

Condensed Matter

Superconductivity

4 pages, 7 figures

Scientific paper

We report far-infrared reflectance measurements on polycrystalline superconducting samples of SmO$_{1-x}$F$_{x}$FeAs ($x$ = 0.12, 0.15 and 0.2). We clearly observe superconductivity induced changes of reflectivity in a broad range of energies, which resembles earlier optical measurements on high $T_{c}$ cuprates. The superconducting-to-normal reflectivity ratio $R_{s}/R_{n}$ grows for the photon energies below 18 meV and shows a complicated structure due to the presence of a strong infrared-active phonon at about 10 meV.

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