Ba-Cu-O-Y, Optics, Orthorhombic, Rare earth

• Ba-Cu-H-O-Y
• Ba-Cu-O-Y-Zn
• Ba-Cu-Fe-O-Y
• Ba-Co-Cu-O-Y
• phonons
• wavenumber of optical phonon
• optical spectra
• reflectivity
• optical conductivity
• transitional
• rare earth
• chalcogen
• alkaline
• high-tc superconductor