A spin beam splitter in graphene through the Goos–Hänchen shift

Journal Article · Mon Nov 24 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4902880· OSTI ID:22392065

Zhang, Qingtian ^[1]

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1. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)

We propose a method of realizing an effective electron spin beam splitter in graphene through the Goos-Hänchen effect. The device consists of a layer of monolayer graphene on which two ferromagnetic stripes are deposited with parallel or antiparallel magnetization configuration. It is shown that the transmitted spin-up and spin-down electron beams are found at different longitudinal positions and their spatial separation can be enhanced by the number of transmission resonances formed between the two ferromagnetic stripes. The spatial separation between the spin-up and spin-down electron beams can reach values up to hundreds of wavelengths, which can be observed experimentally.

• OSTI ID: 22392065
• Journal Information: Applied Physics Letters, Vol. 105, Issue 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM SPLITTING
ELECTRON BEAMS
ELECTRONS
GRAPHENE
MAGNETIZATION
RESONANCE
SPIN