应变超晶格中的内建电场

The Built-in Electric Field in the Strained Superlattice

研究了应变超晶格结构中内建电场对超晶格量子阱结构的影响.通过建模及计算给出由内建电场引起的量子阱斜率的定量描述,在不同组分及相同组分不同含量的超晶格中,讨论了描述势阱倾斜程度的斜率随势阱材料宽度的变化关系.结果表明,超晶格量子阱斜率的走势与组分有关,同族晶体构成的量子阱斜率的走势相同.

The influence of the built-in electric field on the band structures of the quantum well in the strained supperlattice is studied.The quantitative description of the slope of quantum well,due to the built-in electric field,is given by modeling and calculating.In the superlattices with different components or different contents,the slope of quantum well,which describes the inclined shape of the well,as functions of the layer thickness,is discussed.The results indicate that the trend of slope is related to the components,the trends are same in the quantum wells with the same group of the components.