Parity anomaly and quantum spin Hall effect due to extended defects in graphene

Martina Hentschel

Max-Planck-Institut für Physik komplexer Systeme, Germany

Authors: Martina Hentschel and Grigory Tkachov Abstract: We discuss a novel realization of the parity anomaly [F. D. M. Haldane, Phys. Rev. Lett. 61, 2015 (1988)] leading to an extrinsic quantum spin Hall effect in graphene induced by extended defects such as lattice termination supporting localized zero-energy modes. Apart from the spin conductance quantization the spin Hall transition manifests itselfs as a singular behavior of the tunneling density of states.