三元混晶中电子极化势与极化电荷

Polarization Potential and Polarized Charge of a Electron in a Ternary Mixed Crystal

本文计及双支纵光学声子模的作用，采用微扰法导出了极性三元混晶Ａ＿ｘＢ＿（１－ｘ）Ｃ中极化子的二级近似波函数，进一步计算了电子的极化势和极化电荷密度．数值计算了混晶Ａｌ＿ｘＧａ＿（１－ｘ）Ａｓ和ＺｎＴｅ＿ｘＳｅ＿（１－ｘ）中极化势与极化电荷密度对组分ｘ的依赖关系，并对结果进行了讨论．

he second order approximation wave function of a polaron in a ternary mixed crystal is de-rived by a pertubation method,the polarization potential and the polarized charge density of aelectron are also calculated.The numerical results are given for Al_xGa_(1-x)As and ZnTe_xSe_(1-x) with different composition x,and the results are discussed.