Chalcogen, Conductor, Optical properties, Orthorhombic

• Ba-Cu-O-Y
• Ca-La-Mn-O
• Bi-Ca-Cu-O-Sr
• Fe-La-O
• Cu-La-O-Sr
• phonons
• optical spectra
• Raman spectra
• wavenumber of optical phonon
• optical absorption
• conductor
• chalcogen
• transitional
• semiconductor
• oxide