Chalcogen, Conductor, Non-disordered, Semiconductor, Fermi surface

• Fe-Se-Te
• Fe-Te
• Ba-Cu-O-Y
• O-Ru-Sr
• Bi-Te
• semiconductor
• non-disordered
• conductor
• chalcogen
• metal
• tetragonal
• orthorhombic
• trigonal
• cubic
• hexagonal