Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: Transport: Graphene - Electronic Properties and Transport 2 (jointly with DS, HL, MA, and TT)

O 26.9: Talk

Tuesday, March 12, 2013, 11:45–12:00, H17

Hot Spots and Boundary Conditions in the Quantum Hall Effect — •Tobias Kramer — Universitaet Regensburg, Inst. Theor. Physik, Germany

I discuss the influence of metallic boundary conditions due to the device contacts on the observation and current distribution in the quantum Hall effects. The current density differs in the presence of hot-spots completely from the often assumed edge-state transport picture. A model for transport in graphene [1] based on the self-consistent solution of the classical Hall effect [2] is put forward.
[1] T. Kramer, C. Kreisbeck, V. Krueckl, E. Heller, R. Parrott, and C.-T. Liang, Phys. Rev. B 81, 081410(R) (2010)
T. Kramer, V. Krueckl, E. Heller, and R. Parrott, Phys. Rev. B 81, 205306 (2010)