Chalcogen, Lanthanoid, Oxide, Cu-La-O, Electronic energy gap

• Cu-La-O-Sr
• Cu-La-O-S
• Ba-Cu-La-O
• Ca-Cu-La-O
• values of electronic energy gap
• energy gap for direct transition
• polaron formation energy
• charge-transfer energy
• thermal energy gap
• rare earth
• lanthanoid
• oxide
• chalcogen
• transitional
• tetragonal
• orthorhombic
• trigonal
• monoclinic
• cubic