Impact of intercalated cobalt on the electronic properties of graphene on Pt(111)
Abstract
We report on the strong interaction between graphene and intercalated cobalt revealed by scanning tunneling spectroscopy (STS). A significant difference between pristine graphene and Co-intercalated graphene is identified at high bias voltages in the regime of field emission. For MLg/Co/Pt a resonance is observed at 3 eV which is not visible for pristine graphene. Additionally, we observe a change of the phonon energy upon Co intercalation. Our STS results indicate that the Dirac point will not be preserved for graphene on Pt(111) if a single atomic layer of Co is intercalated.
- Publication:
-
Physical Review B
- Pub Date:
- May 2012
- DOI:
- 10.1103/PhysRevB.85.205434
- Bibcode:
- 2012PhRvB..85t5434G
- Keywords:
-
- 73.22.Pr;
- 68.37.Ef;
- 73.20.-r;
- Scanning tunneling microscopy;
- Electron states at surfaces and interfaces