Chalcogen, Ruddlesden-popper, Electronic energy gap

• Cu-La-O
• O-Sr-Ti
• La-Mn-O-Sr
• O-Sn-Sr
• Cu-Nd-O
• values of electronic energy gap
• energy gap for direct transition
• charge-transfer energy
• polaron formation energy
• energy gap for indirect transition
• ruddlesden-popper
• chalcogen
• oxide
• transitional
• tetragonal
• orthorhombic