Chalcogen, Transitional, Kim, Phonons, Tetragonal

• Ba-O-Ti
• Na-Nd-O-Ti
• La-Na-O-Ti
• Gd-Na-O-Ti
• Na-O-Sm-Ti
• wavenumber of optical phonon
• Raman spectra
• infrared spectra
• energy of optical phonon
• phonon density of states
• transitional
• chalcogen
• oxide
• non-disordered
• disordered