FeTe${}_{0.55}$Se${}_{0.45}$: a multiband superconductor in the clean and dirty limit

C. C. Homes, Y. M. Dai, J. S. Wen +2

The detailed optical properties of the multiband iron-chalcogenide superconductor FeTe${}_{0.55}$Se${}_{0.45}$ have been reexamined for a large number of temperatures above and below t…