Modeling of the energy spectrum of the CdTe/Hg1-xCdxTe/CdTe quantum well by varying the band offset, well width, and composition x

Currently, CdTe/CdxHg1-xTe/CdTe heterostructures attract particular interest and are very promising for developing the next-generation terahertz radiation detectors. However, properties of such structures have not yet been studied in sufficient detail. The energy spectrum and wave functions of the CdTe/CdxHg1-xTe/CdTe heterostructure were theoretically modeled for various well widths, the valence band offset, and composition x in the range 0<x<0.16. Characteristic features of the behavior of energy levels of two-dimensional electrons in such structures were studied with respect to x variation. A criterion for determining the number of electronic levels below the conduction band bottom, applicable to compositions 0<x<0.16 was obtained. The time of two-dimensional electron relaxation by longitudinal optical phonons was calculated.