Triplet proximity effect and odd-frequency pairing in graphene

Details Triplet proximity effect and odd-frequency pairing in graphene Triplet proximity effect and odd-frequency pairing in graphene

2010-04-26

arxiv.org/abs/1004.4629v1

Phys. Rev. B 82, 041409(R) (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures. Submitted to Physical Review.

Scientific paper

We study the interplay between proximity-induced superconductivity and ferromagnetism in graphene by self-consistently solving the Bogoliubov-de Gennes equations on the honeycomb lattice. We find that a strong triplet proximity effect is generated in graphene, leading to odd-frequency pairing correlations. These odd-frequency correlations are clearly manifested in the local density of states of the graphene sheet, which can be probed via STM-measurements. Motivated by recent experiments on S$\mid$N$\mid$S graphene Josephson junctions, we also study the spectrum of Andreev-bound states formed in the normal region due to the proximity effect. Our results may be useful for interpreting spectroscopic data and can also serve as a guideline for future experiments.

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