Optical Conductivity Study of $f$ Electron States in YbCu${}_2$Ge${}_2$ at High Pressures to 20 GPa

H. Okamura, M. Nagata, A. Tsubouchi +3

Optical conductivity [$\sigma (\omega )$] of YbCu${}_2$Ge${}_2$ has been measured at external pressures ($P$) to 20 GPa, to study the $P$ evolution of $f$ electron hybridized states. At $P$=0, $σ(…