Gate-tunable graphene spin valve

Sungjae Cho; Yung Fu Chen; Michael S. Fuhrer

doi:10.1063/1.2784934

Gate-tunable graphene spin valve

Sungjae Cho, Yung Fu Chen, Michael S. Fuhrer

Research output: Contribution to journal › Article › Research › peer-review

271 Citations (Scopus)

Abstract

The authors perform nonlocal four-probe spin-valve experiments on graphene contacted by ferromagnetic Permalloy electrodes. They observe sharp switching and often sign reversal of the nonlocal resistance at the coercive field of the electrodes, indicating the presence of a spin current between injector and detector. The nonlocal spin-valve signal changes magnitude and sign with back-gate voltage, and is observed up to T=300 K. The gate voltage variation of the spin-valve signal may result from quantum-coherent transport, as evidenced by Fabry-Ṕrot-like oscillations of the current.

Original language	English
Article number	123105
Journal	Applied Physics Letters
Volume	91
Issue number	12
DOIs	https://doi.org/10.1063/1.2784934
Publication status	Published - 28 Sept 2007
Externally published	Yes

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Gate-tunable graphene spin valve

Abstract

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