Chalcogen, Conductor, Disordered, Optical properties, Tetragonal

• O-Ti
• Cu-La-O-Sr
• Ba-O-Ti
• Cu-La-O
• O-Sn
• phonons
• optical spectra
• optical absorption
• Raman spectra
• luminescence
• conductor
• chalcogen
• disordered
• transitional
• semiconductor