Ba-Cu-O-Y, Chalcogen, Conductor, Semiconductor, Optical properties

• Ba-Co-Cu-O-Y
• Ba-Cu-Fe-O-Y
• Ba-Cu-O-Pr-Y
• Al-Ba-Cu-O-Y
• phonons
• wavenumber of optical phonon
• optical spectra
• optical conductivity
• reflectivity
• high-tc superconductor
• conductor
• alkaline
• chalcogen
• oxide
• orthorhombic
• tetragonal