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The effect of Rashba spin-orbit interaction and anisotropic strain on theelectronic, optical and thermodynamic properties of artificial graphene-likesuperlattice composed of InAs-GaAs quantum dots has been consideredtheoretically. The electronic energy dispersions have been obtained usingGreen's function formalism in combination with Fourier transformation to thereciprocal space and an exact diagonalization technique. We have observed asplitting of Dirac points and appearance of edditional Dirac-like points due tothe Rashba spin-orbit interaction. Breaking of the hexagonal symmetry of thedispersion surfaces caused by the strain anisotropy is observed as well. It isshown that both the spin-orbit interaction and strain anisotropy have aqualitative impact on the measurable characteristics of the consideredstructure and can be used as effective tools to control the performance ofdevices based on artificial graphene.

Rashba-splitting of the Dirac points and the symmetry breaking in the strained artificial graphene