Superconducting transition temperature - hole concentration diagram

• Bi-Ca-Cu-O-Sr
• Bi-Br-Ca-Cu-O-Sr
• Bi-Ca-Cu-Li-O-Pb-Sr
• Bi-Ca-Cu-Li-O-Sr
• Bi-Ca-Cu-O-Pb-Sr
• conductor
• transitional
• chalcogen
• alkaline
• metal
• orthorhombic
• tetragonal