Chalcogen, Quaternary, Kim, Optical properties

• Ba-Cu-O-Y
• Al-Mg-O-Ti
• Cr-Cu-Fe-S
• Al-Er-S-Zn
• La-Na-O-Ti
• phonons
• optical spectra
• wavenumber of optical phonon
• Raman spectra
• luminescence
• quaternary
• chalcogen
• transitional
• disordered
• oxide
• tetragonal
• cubic
• orthorhombic
• monoclinic
• hexagonal