The structural and electronic properties of CrO3 interacting with graphene layer are calculated using ab initio methods based on the density functional theory. The CrO3 acts as an electron acceptor modifying the original electronic and magnetic properties of the graphene surface through an adsorption process. The changes induced in the electronic properties are strongly dependent on the CrO3 adsorption site, and for some sites, it is possible to open a gap in the electronic band structure. Spin polarization effects are also predicted for some adsorption configurations for which the binding energy is lower and charge transfer is higher.
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