Chalcogen, Conductor, Metal, Energy band structure, Orthorhombic

• Ba-Cu-O-Y
• Fe-Se
• Te-W
• Ba-Cu-F-O-Y
• Ag-Se
• electron energy band structure
• Fermi surface
• Fermi energy
• energy level diagram
• Brillouin zone
• metal
• chalcogen
• conductor
• transitional
• non-disordered