Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 13, Pages 6019-6023Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp111504q
Keywords
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Funding
- NRF [2010-0020414, WCU: R32-2008=000-10180-0]
- KISTI [KCS-2008-K08-0002]
- TJ Park Doctoral Fellowship
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Graphene is a promising material for spintronics due to its outstanding spin transport property. Its maximally exposed 2p(z) orbitals allow tuning of electronic structure toward better functionality in device applications. Because the positions of carbon atoms are commensurate with those of Ni atoms on the substrate, we design a graphene spin-valve device based on the epitaxial graphene grown on the Ni (111) surface. We explored its transport properties with non equilibrium Green function theory combined with density functional theory. We show that the device has magnetoresistance (similar to 110%) clue to the strong spin-dependent interaction between the Ni surface and the epitaxial graphene sheet.
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