Strain-Renormalized Energy Spectra of Electrons and Holes in InAs Quantum Dots in the InAs∕GaAs Heterosystem

Abstract

Analytical expressions describing the energy spectrum of electrons and holes are obtained for a quantum dot (QD) occurring in a self-consistent strain field created by an array of coherently stressed QDs. A method of taking into account the lattice mismatch at the QD-matrix interface is proposed that allows for the dependence of the mismatch parameter on the QD size and the matrix layer thickness. It is shown that the internal elastic strain arising at the QD-matrix interface influences the energy spectrum of electrons more significantly than the spectrum of holes.