Dresden 2009 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 26: Transport: Graphene and Carbon Nanotubes

TT 26.6: Talk

Wednesday, March 25, 2009, 15:45–16:00, HSZ 03

Functional RG on graphene nanodisks — •Michael Kinza, Jutta Ortloff, and Carsten Honerkamp — Universität Würzburg, Institut für Theoretische Physik und Astrophysik

Graphene-nanodisks are nanometer-sized graphene structures with a closed edge. They are promising candidates for future nanoelectronic devices. In a tight-binding approximation trigonal zigzag nanodisks with size N (which is proportional to the number of edge atoms) have 2N-fold degenerated zero-energy-states. By using the functional renormalization group an effective Hamiltonian for these zero-energy-states is derived and used to explore spin-resolved transport through the nanodisks coupled to metallic electrodes in the coulomb blockade regime.