Frohlich极化子的能带非抛物性效应理论

THEORY OF THE BAND NONPARABOLICITY EFFECTS ON FROHLICH POLARONS

本文对Frohlich极化子的能带非抛物性效应进行了理论研究。所使用的模型是用一个简化的双能带近似。我们发现能带非抛物性对极化子束缚能和有效质量重整化会产生影响。与早期的理论相对照,我们考虑了能带非抛物性,并附加了极化子效应。本文的理论与实验结果符合。

The influence of the nonparabolicity of band structure on Frohlich 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.