The properties of a monolayer of graphite ("graphene") grown on a metal substrate are determined by the interface to the metal.
We investigate the growth of graphene and the structural properties of the graphene-metal interface by LEED and STM.
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Further we look at the electronic properties and the interaction betwen
the electrons in the graphene and those in the metal surface using Photoelectron Spectroscopy and time-resolved 2PPE. This allows to determine transition rates
of electrons from graphene into metal states on the femtosecond time scale.
Publications
D. Gugel, D. Niesner, C. Eickhoff, S. Wagner, M. Weinelt, and T. Fauster "Two-photon photoemission from image-potential states of epitaxial graphene", 2D Mater. 2, 045001 (2015). DOI: 10.1088/2053-1583/2/4/045001
D. Niesner and T. Fauster "Image-potential states and work function of graphene",
J. Phys.: Condens. Matter 26 393001 (2014). DOI: 10.1088/0953-8984/26/39/393001
P. L. de Andres, P. M. Echenique, D. Niesner, T. Fauster, and A. Rivacoba "One-dimensional potential for image-potential states on graphene", New J. Phys. 16 023012 (2014). DOI: 10.1088/1367-2630/16/2/023012
D. Nobis, M. Potenz, D. Niesner, and T. Fauster "Image-potential states of graphene
on noble-metal surfaces", Phys. Rev. B 88 195435 (2013). DOI: 10.1103/PhysRevB.88.195435
D. Niesner, T. Fauster, J. I. Dadap, N. Zaki, K. R. Knox, P.-C. Yeh, R. Bhandari,
R. M. Osgood, M. Petrović, and M. Kralj "Trapping surface electrons on graphene
layers and islands", Phys. Rev. B 85 081402(R) (2012). DOI: 10.1103/PhysRevB.85.081402
Contact
2PPE: Daniel Niesner, Thomas Fauster
STM/LEED: Lutz Hammer, Alexander Schneider