Ba-Cu-Er-O, Chalcogen, Oxide, Pmmm

• Ba-Cu-Er-Ni-O
• Ba-Cu-Er-O-Zn
• Ba-Cu-Er-Fe-O
• Ba-Cu-Er-Ga-O
• superconductivity
• electronic and electrical properties
• structural properties
• superconducting transition temperature
• values of superconducting transition temperature
• disordered
• cuprate
• chalcogen
• alkaline
• high-tc superconductor
• orthorhombic