Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.137205
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Funding
- ONR [N00014-05-1-0568]
- NSF [CAREER DMR-0450037, CAREER DMR-0748910, MRSEC DMR- 0820414]
- CNID [ONR/DMEA-H94003-07-2-0703]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [820414] Funding Source: National Science Foundation
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Spin-dependent properties of single-layer graphene (SLG) have been studied by nonlocal spin valve measurements at room temperature. Gate voltage dependence shows that the nonlocal magnetoresistance (MR) is proportional to the conductivity of the SLG, which is the predicted behavior for transparent ferromagnetic-nonmagnetic contacts. While the electron and hole bands in SLG are symmetric, gate voltage and bias dependence of the nonlocal MR reveal an electron-hole asymmetry in which the nonlocal MR is roughly independent of bias for electrons, but varies significantly with bias for holes.
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