电子多声子作用对能带电子有效质量的影响

EFFECT OF ELECTRON—MANY PHONON INTERACTION ON EFFECTIVE MASS OF ELECTRON

本文考虑声子的动力学过程,用格林函数方法导出了T《德拜温度T_D时,电子多声子作用对能带电子有效质量的修正公式。指出电子多声子过程中高频声子有重要作用。

The modified formula of effective mass of electron in energy band are obtained by incorporating the effect of electron—many phonon interaction into the theory of effective mass of electrons for the case of temperature T《Debye temperature T_D It is pointed out that the high frequency phonon plays an imporatant rule in the effect of electron--many phonon interaction on the effective mass of electron in energy band.