Ba-Cu-O-Y, Conductor, Disordered, Wavenumber of optical phonon

• Ba-Cu-Fe-O-Y
• Ba-Co-Cu-O-Y
• Ba-Cu-La-O-Y
• Ba-Cu-Ni-O-Y
• conductor
• disordered
• chalcogen
• alkaline
• high-tc superconductor
• orthorhombic
• tetragonal