Chalcogen, Non-disordered, O-Ti, Optics

• Ba-O-Ti
• O-Sr-Ti
• O-Pb-Ti
• La-O-Ti
• phonons
• optical spectra
• Raman spectra
• wavenumber of optical phonon
• optical absorption
• transitional
• non-disordered
• chalcogen
• oxide
• disordered
• tetragonal
• cubic
• orthorhombic
• monoclinic
• trigonal