Scaling of the Fano effect of the in-plane Fe-As phonon and the superconducting critical temperature in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$

B. Xu, E. Cappelluti, L. Benfatto +11

By means of infrared spectroscopy we determine the temperature-doping phase diagram of the Fano effect for the in-plane Fe-As stretching mode in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$.…