用Monte Carlo方法模拟闪锌矿相ZnS电子的输运特性

用Monte Carlo方法模拟闪锌矿相(zinc blende)ZnS电子的输运特性.实验采用的是非抛物线模型计算电子的能带结构,模拟包含了声学声子散射,极性光学声子散射,压电散射,电离杂质散射,能谷间散射以及自散射等散射机理.通过模拟得到了ZnS材料的平均漂移速度、平均电子能量随电场强度变化的曲线图,以及总散射率随电子能量变化图,并将结果与文献报道的模拟结果1]进行比较得出:本实验方法具有模型简单,计算速度快,获得结果比较准确的优点.

MONTE CARLO SIMULATION OF THE ELECTRON TRANSPORT PROPERTIES FOR ZINCBLENDE ZNS

We present the calculated results of electron transport properties of the zinc blende ZnS with Monte Carlo simulations.The band structure data being used in the simulations are based on the non-parabolicity method.Many scattering mechanism are included such as acoustic phonon scattering,polar optical phonon scattering,piezoelectricity scattering,impurity scattering,intervalley scattering and self-scattering.The characteristics of drift velocity-field and average energy-field for ZnS materials are obtained from Monte Carlo calculations,and the total scattering rate is also obtained.The comparison with the Monte Carlo results of ZnS reported by other authors have been made,and the result is that the modle is simple,the calculation speed is fast and the result is accurate.