Optical Study of BaFe${}_2$As${}_2$ under pressure: Coexistence of spin-density-wave gap and superconductivity

E. Uykur, T. Kobayashi, W. Hirata +3

Temperature-dependent reflectivity measurements in the frequency range 85 - 7000 cm${}^{-1}$ were performed on BaFe${}_2$As${}_2$ single crystals under pressure up to $\sim$5 GPa. The co…