Repulsive van der Waals forces due to hydrogen exposure on bilayer graphene
We consider the effect of atomic hydrogen exposure to a system of two undoped sheets of graphene grown near a silica surface (the first adsorbed to the surface and the second freestanding near the surface). In the absence of atomic hydrogen, the van der Waals force between the sheets is attractive at all separations, causing the sheets to come closer together. However, with the addition of atomic hydrogen between the sheets, the long-range van der Waals interaction turns repulsive at a critical...[Show more]
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|Source:||Physical Review A: Atomic, Molecular and Optical Physics|
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