Gate-tunable graphene spin valve

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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-Perot-like oscillations of the current.
Publisher
AMER INST PHYSICS
Issue Date
2007-09
Language
English
Article Type
Article
Keywords

ROOM-TEMPERATURE; BERRYS PHASE; TRANSPORT; ACCUMULATION; PRECESSION; INJECTION

Citation

APPLIED PHYSICS LETTERS, v.91, no.12, pp.123105 - 123105

ISSN
0003-6951
DOI
10.1063/1.2784934
URI
http://hdl.handle.net/10203/201430
Appears in Collection
PH-Journal Papers(저널논문)
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