American Institute of Physics, Applied Physics Letters, 9(95), p. 092104
DOI: 10.1063/1.3216580
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We study numerically cross conductances in a four-terminal all-graphene setup. We show that far away from the Dirac point current flows along zigzag directions, giving the possibility to guide the current between terminals using a tunable pn-junction. The device operates as a gate-controlled current switch, and the electronic properties of graphene are crucial for efficient performance. ; Comment: 8 pages, 4 figures; minor clarifications, removed content