Strong Coupling Superconductivity in Iron-Chalcogenide FeTe${}_{0.55}$Se${}_{0.45}$

W. K. Park, C. R. Hunt, H. Z. Arham +6

The superconducting order parameter in the iron-chalcogenide superconductor FeTe${}_{0.55}$Se${}_{0.45}$ ($T_{\text{c}}$ = 14.2 K) is investigated by point-contact Andreev reflection s…