Pseudogap in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ as seen via optical conductivity

Y. M. Dai, B. Xu, B. Shen +4

We report the observation of a pseudogap in the \emph{ab}-plane optical conductivity of underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ ($x=0.2$ and 0.12) single crystals. Both samp…