Far infrared transmission of SmTe under high pressure

摘要: Abstract We measured the transmission spectra of SmTe under several pressures in energy region between 40 and 320 cm−1 at 300 100 K. At P = 0 GPa a strong absorption appears from 90 to 190 K 165 110 This indicates that ωTO increases with temperature ωLO decreases increasing temperature. Another around 290 half width 20 cm−1. The possibility for its origin is considered as two methods. One seems be due phonon process. other magnetic quasi-particle such polaron. found semiconductor-metal transition occurs 3.5 GPa.