Journal
SCIENTIFIC REPORTS
Volume 2, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep00624
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Funding
- DOD/DMEA [H94003-09-2-0904]
- NSF-MRSEC [DMR-0820382]
- NSF [005084-002]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [820382] Funding Source: National Science Foundation
- Directorate For Engineering [1102074] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1237818] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1102074] Funding Source: National Science Foundation
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Despite theoretical predictions, the question of room-temperature magnetic order in graphene must be conclusively resolved before graphene can fully achieve its potential as a spintronic medium. Through scanning tunneling microscopy (STM) and point I-V measurements, the current study reveals that unlike pristine samples, graphene nanostructures, when functionalized with aryl radicals, can sustain magnetic order. STM images show 1-D and 2-D periodic super-lattices originating from the functionalization of a single sub-lattice of the bipartite graphene structure. Field-dependent super-lattices in 3-nm wide zigzag nanoribbons indicate local moments with parallel and anti-parallel ordering along and across the edges, respectively. Anti-parallel ordering is observed in 2-D segments with sizes of over 20 nm. The field dependence of STM images and point I-V curves indicates a spin polarized local density of states (LDOS), an out-of-plane anisotropy field of less than 10 Oe, and an exchange coupling field of 100 Oe at room temperature.
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