Spin-current to charge-current conversion and magnetoresistance in a hybrid structure of graphene and yttrium iron garnet

• Autor(a) principal: Mendes, J. B. S.
• Data de Publicação: 2015
• Outros Autores: Santos, O. Alves, Meireles, L. M., Lacerda, R. G., Vilela-Leão, L. H., Machado, F. L. A., Rodríguez-Suárez, R. L., Azevedo, A., Rezende, S. M.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: https://doi.org/10.1103/PhysRevLett.115.226601; http://www.locus.ufv.br/handle/123456789/19487
• topic: Spin-Current; Charge-current conversion; Magnetoresistance; Graphene; Yttrium iron garnet

The use of graphene in spintronic devices depends, among other things, on its ability to convert a spin excitation into an electric charge signal, a phenomenon that requires a spin-orbit coupling (SOC). Here we report the observation of two effects that show the existence of SOC in large-area CVD grown single-layer graphene deposited on a single crystal film of the ferrimagnetic insulator yttrium iron garnet (YIG). The first is a magnetoresistance of graphene induced by the magnetic proximity effect with YIG. The second is the detection of a dc voltage along the graphene layer resulting from the conversion of the spin current generated by spin pumping from microwave driven ferromagnetic resonance into a charge current, which is attributed to the inverse Rashba-Edelstein effect.