Chalcogen, Conductor, Phonons, Tetragonal

• Ba-Cu-O-Y
• O-Ti
• Ba-O-Ti
• Cu-La-O
• Fe-K-Se
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• conductor
• chalcogen
• transitional
• semiconductor
• disordered