Chalcogen, Conductor, Disordered, Phonons

• Bi-Fe-O
• Ba-Cu-O-Y
• O-Zn
• Ba-O-Ti
• Fe-O
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• wavenumber of longitudinal optical phonon
• vibrational spectra
• conductor
• disordered
• chalcogen
• transitional
• semiconductor
• cubic
• tetragonal
• orthorhombic
• trigonal
• monoclinic