Chalcogen, Metal, Energy band structure, Trigonal

• Bi-Se
• Bi-Te
• Se-Ti
• Bi-I-Te
• Ir-Te
• electron energy band structure
• Fermi surface
• Fermi energy
• Brillouin zone
• energy at Fermi level
• metal
• chalcogen
• non-disordered
• conductor
• transitional