Theoretical calculations to investigate thermodynamic properties of 2D electron gas in InP/InPBiN quantum structure

Abstract

The electronic band structure of InP/InNPBi has been theoretically investigated within the framework of the band anticrossing (BAC) model. The matched InP/InNPBi heterostructure has been proposed as an interface that confines electrons in a 2D sheet. The physical parameters of this structure are determined considering the BAC model and based on the self-consistent calculation of coupled Schrodinger-Poisson equations. Thermodynamic properties of the quantum gas of noninteracting electrons are investigated by calculating the chemical potential (μ), the magnetization (M), and the specific heat capacity (Cv) in the presence of a quantizing magnetic field and a finite temperature. The effect of characteristic parameters of the structure (broadening parameter, doping level, and effective mass) on the thermodynamic properties of gas is discussed. More interest is focused on the study of the evolution of Cv as a function of temperature for different estimated effective masses of InNPBi material.