Superconducting properties of the Fe-based layered superconductor LaFeAsO0.9F0.1-delta.
نویسندگان
چکیده
We have employed a new route to synthesize single phase F-doped LaOFeAs compound and confirmed the superconductivity above 20 K in this Fe-based system. We show that the new superconductor has a rather high upper critical field of over 50 T. A clear signature of superconducting gap opening below T(c) was observed in the far-infrared reflectance spectra, with 2Delta/kT(c) approximately 3.5-4.2. Furthermore, we show that the new superconductor has electron-type conducting carriers with a rather low-carrier density.
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ورودعنوان ژورنال:
- Physical review letters
دوره 101 5 شماره
صفحات -
تاریخ انتشار 2008