Pseudospin triplet p-wave topological order in zigzag-terminated graphene

Grigory Tkachov

Max-Planck-Institut für Physik komplexer Systeme, Germany

Authors: Martina Hentschel and Grigory Tkachov Abstract: Scanning tunneling experiments and tight-binding calculations show that zigzag-shaped graphene boundaries support edge states in a zero magnetic field. We propose an effective low-energy model where such edge states arise as a consequence of pseudospin triplet p-wave pairing induced by a topological defect of a domain wall type. Our approach adequately describes the measured tunneling density of states and, also, predicts new phenomena such as an analogue of the Little-Parks effect in superconductors.