Determination of Edge Purity in Bilayer Graphene Using micro-Raman Spectroscopy

Details Determination of Edge Purity in Bilayer Graphene Using micro-Raman Spectroscopy Determination of Edge Purity in Bilayer Graphene Using micro-Raman Spectroscopy

2010-06-29

arxiv.org/abs/1006.5738v1

Appl. Phys. Lett. 97, 031908 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures, to appear in Applied Physics Letters

Scientific paper

Polarization resolved micro-Raman spectroscopy was carried out at the edges of bilayer graphene. We find strong dependence of the intensity of the G band on the incident laser polarization, with its intensity dependence being 90 degrees out of phase for the armchair and zigzag case, in accordance with theoretical predictions. For the case of mixed-state edges we demonstrate that the polarization contrast reflects the fractional composition of armchair and zigzag edges, providing a monitor of edge purity, which is an important parameter for the development of efficient nanoelectronic devices.

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