Static charging of graphene and graphite slabs

Details Static charging of graphene and graphite slabs Static charging of graphene and graphite slabs

2010-09-29

arxiv.org/abs/1009.6002v2

Appl. Phys. Lett. 98, 131908 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

accepted for publication in APL (after 226 days)

Scientific paper

10.1063/1.3573806

The effect of external static charging of graphene and its flakes are investigated by using first-principles calculations. While the Fermi level of negatively charged graphene rises and then is quickly pinned by the parabolic, nearly free electron like bands, it moves down readily by removal of electrons from graphene. Excess charges accumulate mainly at both surfaces of graphite slab. Even more remarkable is that Coulomb repulsion exfoliates the graphene layers from both surfaces of positively charged graphite slab. The energy level structure, binding energy and and spin-polarization of specific adatoms adsorbed to a graphene flake can be monitored by charging.

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