Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 108: Graphene: Intercalation (O with HL/TT)

HL 108.8: Talk

Friday, March 20, 2015, 12:15–12:30, MA 041

Bismuth Intercalated Graphene on Iridium Probed by STM and ARPES — •Jonas Warmuth¹, Matteo Michardi², Torben Hänke¹, Marco Bianchi², Jens Wiebe¹, Roland Wiesendanger¹, Philip Hofmann², and Alexander Khajetoorians³ — ¹Department of Applied Physics, University of Hamburg, Germany — ²Department of Physics and Astronomy, University of Aarhus, Denmark — ³Institute for Materials and Molecules, Radboud University, Nijmegen, Netherlands

We report on the investigation of bismuth intercalated graphene grown on Ir(111) by means of STM and ARPES. The STM measurements reveal a complex periodic structure upon Bi intercalation which we attribute to the formation of a √3 Bi surface alloy. We characterize the changes to the band structure using ARPES, including the doping effects and the modification to the Dirac dispersion.