Chalcogen, Conductor, Kikkawa

• N-Nb-O
• Cu-Fe-O
• N-Nb-O-Si
• Cu-La-O-Sr
• Cr-La-S
• magnetic properties
• structural properties
• electronic and electrical properties
• superconductivity
• conductivity or resistivity
• chalcogen
• conductor
• transitional
• disordered
• semiconductor
• cubic
• trigonal
• orthorhombic
• hexagonal
• tetragonal