Michael Kinza, University of Würzburg,
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. In the end an outlook on further aims of the masterthesis is given.