Surface lattice Green's functions for high-entropy alloys

We study the surface elastic response of pure Ni, random alloy FeNiCr and an average in terms lattice Green's function. propose a scheme for computing per-site function their variations. The accurately reproduces mean full alloy. Variation around this is largest near edge Brillouin-zone decays as $q^{-2}$ with wavevector $q$ towards $\Gamma$-point. also present expressions continuum anisotropic solids finite infinite thickness show that atomistic approaches Our results are first step efficient contact calculations Peierls-Nabarro type models dislocations high-entropy alloys.