title: Graphene as a non-magnetic spin current lens.
abstract: In spintronics, the ability to transport magnetic information often depends on the existence of a spin current traveling between two different magnetic objects acting as the source and probe. A large fraction of this information never reaches the probe and is lost because the spin current tends to travel omnidirectionally. We propose that a curved boundary between a gated and a non-gated region within graphene acts as an ideal lens for spin currents despite being entirely of non-magnetic nature. We show as a proof of concept that such lenses can be utilized to redirect the spin current that travels away from a source onto a focus region where a magnetic probe is located, saving a considerable fraction of the magnetic information that would be otherwise lost.
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Niterói, Brazil.
authors.forename: F S M
authors.initials: FS
authors.lastname: Guimarães
authors.forename: A T
authors.initials: AT
authors.lastname: Costa
authors.forename: R B
authors.initials: RB
authors.lastname: Muniz
authors.forename: M S
authors.initials: MS
authors.lastname: Ferreira