%0 Journal Article
%T Selective focusing of electrons and holes in a graphene-based superconducting lens
%A S. Gomez
%A P. Burset
%A W. J. Herrera
%A A. Levy Yeyati
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevB.85.115411
%X We show that a graphene pnp junction with a central superconducting electrode acts as a Veselago lens for incoming electrons by focusing them and their phase-conjugated counterpart (holes) into different points of the optical axis. This selective focusing suggested by a simple trajectory analysis is confirmed by fully microscopic calculations. Although the focusing pattern is degraded by deviations from the ideal conditions we show that it remains visible for a wide range of parameters. We discuss how this property can be useful for the detection of entangled electron pairs.
%U http://arxiv.org/abs/1204.2096v1