Multi-gap superconductivity in a BaFe1.84Co0.16As2 film from optical measurements at terahertz frequencies

A. Perucchi, L. Baldassarre, C. Marini +10

We measured the THz reflectance properties of a high quality epitaxial thin film of the Fe-based superconductor BaFe${}_{1.84}$Co${}_{0.16}$As${}_2$ with T${}_c$=22.5 K. The film was grown…