Ba-Cu-O-Y, Chalcogen, Disordered, Optics

• Ba-Co-Cu-O-Y
• Ba-Cu-O-Y-Zn
• Ba-Cu-Fe-O-Y
• Ba-Cu-Ni-O-Y
• phonons
• wavenumber of optical phonon
• optical spectra
• reflectivity
• optical conductivity
• rare earth
• disordered
• chalcogen
• alkaline
• transitional
• orthorhombic
• tetragonal