Superconducting transition temperature - hole concentration diagram

• Ba-Cu-O-Y
• Bi-Ca-Cu-O-Sr
• Ce-Cu-Gd-O-Ru-Sr-Y
• Bi-Br-Ca-Cu-O-Sr
• Cu-La-O-Sr
• oxide
• conductor
• alkaline
• chalcogen
• transitional
• orthorhombic
• tetragonal