In this paper, the dispersion of the longitudinal optical phonons is considered in a parabolic approximation. The ground state enery, effective mass and selftrapped energy ef a polaron in a polyatomic crystals are calculated.

• 本文计及纵光学声子的色散,在抛物近似下,计算了多原子晶体中极化子的基态能量,有效质量和自陷能。