Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 91: Poster IIIb (Joint session of DS and HL, organized by HL)

HL 91.11: Poster

Donnerstag, 10. März 2016, 16:00–19:00, Poster A

Quasi-classical ballistic transport in graphene antidot superlattices — •George Datseris, Ragnar Fleischmann, and Theo Geisel — Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Goettingen, Germany

Recent magneto-transport experiments have revealed that electrons in graphene can exhibit similar commensurability effects as those that have been observed in ballistic semiconductor devices. We therefore study quasi-classical models for transport in graphene monolayers patterned with antidot superlattices at magnetic fields below the quantum Hall regime. Using the first order approximation of the dispersion relation of graphene (i.e. the Dirac equation approximation) we reproduce the experimental findings. Progressing from this we explore parameter regions not yet studied in experiment and extend our model to include the quasi-classical dynamics generated by the second order approximation of the dispersion relation.