Work

Gate-tunable graphene spin valve

Year: 2007

Type: article

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=300K. The gate voltage variation of the spin-valve signal may result from quantum-coherent transport, as evidenced by Fabry-Pérot-like oscillations of the current.

Source: Applied Physics Letters

DOI: 10.1063/1.2784934

Authors: Sungjae Cho, Yung-Fu Chen, Michael S. Fuhrer

Institutions: University of Maryland, College Park, University of Illinois Urbana-Champaign

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Materials Research Science and Engineering Center, Harvard University, Office of Naval Research, Division of Materials Research

Award: MRSEC: The University of Maryland Materials Research Science and Engineering Center