Details

Autor(en) / Beteiligte

• Borca, B
• Barja, S
• Garnica, M
• Sánchez-Portal, D
• Silkin, V M
• Chulkov, E V
• Hermanns, C F
• Hinarejos, J J
• Vázquez de Parga, A L
• Arnau, A
• Echenique, P M
• Miranda, R

Titel

Potential energy landscape for hot electrons in periodically nanostructured graphene

Ist Teil von

• Physical review letters, 2010-07, Vol.105 (3), p.036804-036804, Article 036804

Ort / Verlag

United States

Erscheinungsjahr

2010

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We explore the spatial variations of the unoccupied electronic states of graphene epitaxially grown on Ru(0001) and observed three unexpected features: the first graphene image state is split in energy; unlike all other image states, the split state does not follow the local work function modulation, and a new interfacial state at +3  eV appears on some areas of the surface. First-principles calculations explain the observations and permit us to conclude that the system behaves as a self-organized periodic array of quantum dots.