Kim, Phonons, Quaternary, Tetragonal

• La-Na-O-Ti
• Na-Nd-O-Ti
• Gd-Na-O-Ti
• Na-O-Sm-Ti
• K-Li-Nb-O
• wavenumber of optical phonon
• Raman spectra
• infrared spectra
• energy of optical phonon
• wavenumber of transverse optical phonon
• quaternary
• transitional
• chalcogen
• oxide
• rare earth