INTERVALLEY TRANSFER, PLASMA FREQUENCY, AND PLASMON-LO-PHONON INTERACTION IN N-TYPE GALLIUM ANTIMONIDE

A theoretical study is made of the effects of intervalley transfer on the plasma frequency and plasmon-LO-phonon interaction in highly doped n-type gallium antimonide. Because of the difference in masses between the central and secondary valleys, both the plasma frequency and the plasmon-phonon interaction undergo large changes when an appreciable transfer from the central to the secondary valleys occurs as a result of raising the temperature from 0°K to room temperature. © 1969 The American Physical Society.