The effect of adsorption on static conductivity of epitaxial graphene
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An analytical expression for adsorption-induced changes in the static conductivity of the adlayer-single-sheet-graphene-substrate system has been obtained using the Kubo-Greenwood formalism with allowance for the dipole-dipole repulsion in the adlayer. The cases of both metal and semiconductor substrates have been considered. The results are applied to description of the hydrogen monolayer-single-sheet-graphene-tungsten substrate system. Numerical estimations show that the magnitude of the effect of the adsorbed hydrogen monolayer on the static conductivity σeg of epitaxial graphene on tungsten is on the order of the σeg value.
KeywordsTechnical Physic Letter Static Conductivity Single Sheet Epitaxial Graphene Fermi Level Posi Tion
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