Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-26
Nature Nanotechnology 5, 722-726 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
20 pages (includes supplementary info), 7 figures
Scientific paper
10.1038/nnano.2010.172
Graphene devices on standard SiO2 substrates are highly disordered, exhibiting characteristics far inferior to the expected intrinsic properties of graphene[1-12]. While suspending graphene above the substrate yields substantial improvement in device quality[13,14], this geometry imposes severe limitations on device architecture and functionality. Realization of suspended-like sample quality in a substrate supported geometry is essential to the future progress of graphene technology. In this Letter, we report the fabrication and characterization of high quality exfoliated mono- and bilayer graphene (MLG and BLG) devices on single crystal hexagonal boron nitride (h-BN) substrates, by a mechanical transfer process. Variable-temperature magnetotransport measurements demonstrate that graphene devices on h-BN exhibit enhanced mobility, reduced carrier inhomogeneity, and reduced intrinsic doping in comparison with SiO2-supported devices. The ability to assemble crystalline layered materials in a controlled way sets the stage for new advancements in graphene electronics and enables realization of more complex graphene heterostructres.
Dean Cory R.
Hone James
Kim Panki
Lee Chaohong
Meric Inanc
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