THEORY OF THE BAND NONPARABOLICITY EFFECTS ON FR?HLICH POLARONS
Fr?hlich极化子的能带非抛物性效应理论

The influence of the nonparabolicity of band structure on Fr?hlich polarons is studied theoretically. The model used applies a simplified two-band approximation. Nonparabolicity is found to affect both the polaronic binding energy and the effective-mass renormalization. Comparing with the earlier theories, in addition to band nonparabolicity, we have considered the polaron effects. The theory presented in this paper agrees well with experimental results.