Chalcogen, Charge-density wave state, Electron energy band structure

• Nb-Se
• Se-Ti
• Ba-Cu-O-Y
• Se-Ta
• S-Ta
• charge-density wave state
• chalcogen
• metal
• non-disordered
• transitional
• trigonal
• orthorhombic
• tetragonal
• hexagonal
• monoclinic