Measurement of the c-axis optical reflectance of AFe${}_2$As${}_2$ (A=Ba, Sr) single crystals: Evidence of different mechanisms for the formation of two energy gaps

Z. G. Chen, T. Dong, R. H. Ruan +7

We present the c-axis optical reflectance measurement on single crystals of BaFe${}_2$As${}_2$ and SrFe${}_2$As${}_2$, the parent compounds of FeAs based superconductors. Different from th…