Fine structure of the local pseudogap and Fano effect for superconducting electrons near a zigzag graphene edge

Details Fine structure of the local pseudogap and Fano effect for superconducting electrons near a zigzag graphene edge Fine structure of the local pseudogap and Fano effect for superconducting electrons near a zigzag graphene edge

2007-07-20

arxiv.org/abs/0707.3048v3

Physical Review B 76, 235409 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.76.235409

Motivated by recent scanning tunneling experiments on zigzag-terminated graphene this paper investigates an interplay of evanescent and extended quasiparticle states in the local density of states (LDOS) near a zigzag edge using the Green's function of the Dirac equation. A model system is considered where the local electronic structure near the edge influences transport of both normal and superconducting electrons via a Fano resonance. In particular, the temperature enhancement of the critical Josephson current and 0-pi transitions are predicted.

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