Bi, Conductor, Metal, Optical properties, Trigonal

• Bi-Fe-O
• Bi-Se
• Bi-Te
• Bi-I-Te
• Bi-Se-Te
• phonons
• optical spectra
• Raman spectra
• wavenumber of optical phonon
• reflectivity
• metal
• pnictogen
• conductor
• disordered
• semiconductor