▎ 摘　　要

NOVELTY - The method involves growing a first monolayer graphene film. A second monolayer graphene film is grown. The second monolayer graphene film is transferred onto the first monolayer graphene film. The second monolayer graphene film is fluorinated by preventing any edge state conduction. A homoepitaxial tunnel barrier transport device is formed with functionalized graphene-on-graphene. A tunneling behavior is utilized. The homoepitaxial tunnel barrier transport device is operated with functionalized graphene-on-graphene as a spin valve. USE - Method for making a homoepitaxial tunnel barrier transport device with functionalized graphene-on-graphene. ADVANTAGE - The method enables observation of non-local Hanle effect and non-local spin valve (NLSV) to provide strong evidence that the fluorinated graphene tunnel barrier enables efficient spin injection, transport and detection in the graphene channel. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an optical image of a device with fluorination only under contacts.