title: Hydrogenated Graphene as a Homoepitaxial Tunnel Barrier for Spin and Charge Transport in Graphene.
abstract: We demonstrate that hydrogenated graphene performs as a homoepitaxial tunnel barrier on a graphene charge/spin channel. We examine the tunneling behavior through measuring the IV curves and zero bias resistance. We also fabricate hydrogenated graphene/graphene nonlocal spin valves and measure the spin lifetimes using the Hanle effect, with spintronic nonlocal spin valve operation demonstrated up to room temperature. We show that while hydrogenated graphene indeed allows for spin transport in graphene and has many advantages over oxide tunnel barriers, it does not perform as well as similar fluorinated graphene/graphene devices, possibly due to the presence of magnetic moments in the hydrogenated graphene that act as spin scatterers.
authors.affiliation: †Materials Science and Technology Division, ‡Electronics Science and Technology Division, and §Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375, United States.
authors.forename: Adam L
authors.initials: AL
authors.lastname: Friedman
authors.affiliation: †Materials Science and Technology Division, ‡Electronics Science and Technology Division, and §Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375, United States.
authors.forename: Olaf M J
authors.initials: OM
authors.lastname: van 't Erve
authors.affiliation: †Materials Science and Technology Division, ‡Electronics Science and Technology Division, and §Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375, United States.
authors.forename: Jeremy T
authors.initials: JT
authors.lastname: Robinson
authors.affiliation: †Materials Science and Technology Division, ‡Electronics Science and Technology Division, and §Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375, United States.
authors.forename: Keith E
authors.initials: KE
authors.lastname: Whitener
authors.affiliation: †Materials Science and Technology Division, ‡Electronics Science and Technology Division, and §Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375, United States.
authors.forename: Berend T
authors.initials: BT
authors.lastname: Jonker
keywords: electronic transport; graphene; hydrogenated graphene; spin transport; tunnel barrier