title: Controlled coupling of spin-resolved quantum Hall edge states.
abstract: We introduce and experimentally demonstrate a new method that allows us to controllably couple copropagating spin-resolved edge states of a two-dimensional electron gas (2DEG) in the integer quantum Hall regime. The scheme exploits a spatially periodic in-plane magnetic field that is created by an array of Cobalt nanomagnets placed at the boundary of the 2DEG. A maximum charge or spin transfer of 28±1% is achieved at 250 mK.
authors.affiliation: NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127 Pisa, Italy.
authors.forename: Biswajit
authors.initials: B
authors.lastname: Karmakar
authors.forename: Davide
authors.initials: D
authors.lastname: Venturelli
authors.forename: Luca
authors.initials: L
authors.lastname: Chirolli
authors.forename: Fabio
authors.initials: F
authors.lastname: Taddei
authors.forename: Vittorio
authors.initials: V
authors.lastname: Giovannetti
authors.forename: Rosario
authors.initials: R
authors.lastname: Fazio
authors.forename: Stefano
authors.initials: S
authors.lastname: Roddaro
authors.forename: Giorgio
authors.initials: G
authors.lastname: Biasiol
authors.forename: Lucia
authors.initials: L
authors.lastname: Sorba
authors.forename: Vittorio
authors.initials: V
authors.lastname: Pellegrini
authors.forename: Fabio
authors.initials: F
authors.lastname: Beltram