Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 15: Graphene: Structure and Theory I
HL 15.2: Vortrag
Montag, 26. März 2012, 15:15–15:30, EW 201
Electronic structure of graphene on single crystal copper substrates — •Andrew Walter1,2, Shu Nie3, Aaron Bostwick1, Keun Su Kim1,4, Luca Moreschini1, Young Jun Chang1,2, Davide Innocenti5, Karsten Horn2, Kevin F. McCarty3, and Eli Rotenberg1 — 1Advanced Light Source (ALS), E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA — 2Department of Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany, — 3Sandia National Laboratories, Livermore, California 94550, USA. — 4Center for Atomic Wires and Layers, Pohang University of Science and Technology, Pohang 790-784, Korea. — 5University of Rome (Tor Vergata), Rome 00173, Italy
The electronic structure of graphene on Cu(111) and Cu(100) single crystals is investigated using low energy electron microscopy, low energy electron diffraction and angle resolved photoemission spectroscopy. On both substrates the graphene is rotationally disordered and interactions between the graphene and substrate lead to a shift in the Dirac crossing. The graphene film is found to protect the surface state from air exposure, with no change in the effective mass observed.