Measurement of the ν= 1/3 fractional quantum Hall energy gap in suspended graphene

Details Measurement of the ν= 1/3 fractional quantum Hall energy gap in suspended graphene Measurement of the ν= 1/3 fractional quantum Hall energy gap in suspended graphene

2010-10-06

arxiv.org/abs/1010.1187v2

Phys. Rev. Lett. 106, 046801 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

We report on magnetotransport measurements of multi-terminal suspended graphene devices. Fully developed integer quantum Hall states appear in magnetic fields as low as 2 T. At higher fields the formation of longitudinal resistance minima and transverse resistance plateaus are seen corresponding to fractional quantum Hall states, most strongly for {\nu}= 1/3. By measuring the temperature dependence of these resistance minima, the energy gap for the 1/3 fractional state in graphene is determined to be at ~20 K at 14 T.

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