Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 66: Poster Wednesday: 2D Materials

O 66.1: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B2

Structure formation and electron dynamics of Pb intercalated graphene/metal interfaces — •Eva Sophia Walther1, Christina Schott1, Florian Haag1,2, Dominik Jungkenn1, Benjamin Stadtmüller1,2, and Martin Aeschlimann11Department of Physics and Research Center OPTIMAS, TU Kaiserslautern — 2Material Science in Mainz, JGU Mainz

Graphene is the most intriguing low dimensional material for future nano-electronics mainly due to its exceptional electronic properties with a Dirac cone-like spectrum and massless Dirac-Fermions. Yet, for electronic devices, it is necessary to find new ways to functionalize the electronic properties of graphene. One promising route to chemically manipulate graphene is the intercalation of heavy metal atoms between the graphene and the underlying substrate surface. This procedure cannot only suppress the interaction between the substrate surface and the graphene sheet but can also lead to the formation of a band gap at the Dirac-point [1]. Here, we present structural changes of the graphene/metal interfaces upon the adsorption and intercalation of Pb atoms using low energy electron diffraction and photoemission electron microscopy. Subsequently, we turn to the electron dynamics in this material system which was investigated by momentum-resolved photoemission spectroscopy. Our results allow us to correlate the electron dynamics to the vertical interactions of the graphene/metal interface prior to and after the adsorption Pb atoms. [1]I.I. Klimovskikh et al. ACS Nano 2017, 11, 368-376

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