DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 4: Graphene I

O 4.2: Vortrag

Montag, 26. März 2012, 10:45–11:00, MA 041

Local Gating of an Ir(111) Surface Resonance by Graphene Islands — •Simon Johannes Altenburg1, Jörg Kröger2, Tim Wehling3, Burkhard Sachs3, Alexander Lichtenstein3, and Richard Berndt11Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — 2Institut für Physik, Technische Universität Ilmenau, D-98693 Ilmenau, Germany — 3I. Institut für Theoretische Physik, Universität Hamburg, D-20355 Hamburg, Germany

The infuence of graphene islands on the electronic structure of the Ir(111) surface is investigated. Scanning tunneling spectroscopy (STS) indicates the presence of a two-dimensional electron gas with a binding energy of −160 meV and an effective mass of −0.18 me underneath single-layer graphene on the Ir(111) surface. Density functional calculations reveal that the STS features are predominantly due to a hole-like surface resonance of the Ir(111) substrate. Nanometer-sized graphene islands act as local gates, which shift and confine the surface resonance. Funding by the Deutsche Forschungsgemeinschaft via SPP 1459 and SFB 668, the Schleswig-Holstein-Fonds as well as computer time at HLRN are acknowledged.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin