Static charging of graphene and graphite slabs

M. Topsakal, S. Ciraci

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

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 electronlike 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 spin-polarization of specific adatoms adsorbed to a graphene flake can be monitored by charging.

Original languageEnglish (US)
Article number131908
JournalApplied Physics Letters
Volume98
Issue number13
DOIs
StatePublished - Mar 28 2011

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