Ba-Cu-O-Y, High-tc superconductor, Optics, Orthorhombic

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