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 language | English (US) |
|---|---|
| Article number | 131908 |
| Journal | Applied Physics Letters |
| Volume | 98 |
| Issue number | 13 |
| DOIs | |
| State | Published - Mar 28 2011 |
| Externally published | Yes |
Bibliographical note
Funding Information:We thank the DEISA Consortium (www.deisa.eu), funded through the EU FP7 Project No. RI-222919, for support within the DEISA Extreme Computing Initiative. We acknowledge partial financial support from The Academy of Science of Turkey (TUBA).