Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 15: Graphene: Structure and Theory I

HL 15.2: Talk

Monday, March 26, 2012, 15:15–15:30, EW 201

Electronic structure of graphene on single crystal copper substrates — •Andrew Walter^1,2, Shu Nie³, Aaron Bostwick¹, Keun Su Kim^1,4, Luca Moreschini¹, Young Jun Chang^1,2, 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.