Статистика двумерного электронного газа в гетереструктурной квантовой яме InAs/AlSb

Аннотация

The aim of research work. is the determination of the dependence of the characteristic parameters of the electron gas on the basis of the AlSb/InAs/AlSb heterostructure on the total electron concentration. Scientific novelty of the research work A simplified model has been developed for the electron spectrum in minibands, taking into account the nonparabolic properties of the AlSb / InAs / AlSb band structure, the finite quantum well depth for electrons and the mass jump in the AlSb /InAs/AlSb; heterojunction. a new mathematical equation is found for describing the relationships of quantities, such as the total concentration of a two-dimensional electron gas, the electron concentration in minibands, the Fermi energy, the transport mass; A mathematical model describing the dependence of the energy state density of a two-dimensional electron gas and entropy on temperature under the conditions of replenishment of several minibands is introduced; it is shown that it is possible to determine the density of the energy states of a two-dimensional electron gas through the values of the effective mass measured at the Fermi level; It is shown that with an increase in temperature, the stepwise change in the density of states is gradually smoothed out and the nonparabolicity of the dispersion law manifests itself over a wide range of temperatures.