Andreev reflection in bilayer graphene

Details Andreev reflection in bilayer graphene Andreev reflection in bilayer graphene

2007-01-02

arxiv.org/abs/cond-mat/0701045v3

PRB 75, 195322 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 8 figures

Scientific paper

10.1103/PhysRevB.75.195322

We consider the conductance of a normal-superconductor junction in bilayer graphene in the framework of the Dirac-Bogoliubov-De-Gennes equation. A remarkable suppression of the conductance at voltages just below the superconducting gap is found. This can be understood in terms of the spinor structures of the electron and hole excitations, in particular the reflected valence band hole being orthogonal to the incoming electron at normal incidence. Minor changes in response to referee reports, references updated.

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