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Mendes JBS, Alves Santos O, Meireles LM, Lacerda RG, Vilela-Leão LH, Machado FLA, Rodríguez-Suárez RL, Azevedo A, Rezende SM. Spin-Current to Charge-Current Conversion and Magnetoresistance in a Hybrid Structure of Graphene and Yttrium Iron Garnet. PHYSICAL REVIEW LETTERS 2015; 115:226601. [PMID: 26650313 DOI: 10.1103/physrevlett.115.226601] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Indexed: 05/22/2023]
Abstract
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.
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Affiliation(s)
- J B S Mendes
- Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brasil
| | - O Alves Santos
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - L M Meireles
- Departamento de Física, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brasil
| | - R G Lacerda
- Departamento de Física, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brasil
| | - L H Vilela-Leão
- Núcleo Interdisciplinar de Ciências Exatas e Inovação Tecnológica, Universidade Federal de Pernambuco, 55002-970 Caruaru, Pernambuco, Brasil
| | - F L A Machado
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - R L Rodríguez-Suárez
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
- Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago, Chile
| | - A Azevedo
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
| | - S M Rezende
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brasil
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