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Fractional quantum Hall effect in suspended graphene probed with two-terminal measurements
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
We report the observation of the quantized Hall effect in suspended graphene probed with a two-terminal lead geometry. The failure of earlier Hall-bar measurements is discussed and attributed to the placement of voltage probes in mesoscopic samples. New quantized states are found at integer Landau level fillings outside the sequence 2,6,10.., as well as at a fractional filling \nu=1/3. Their presence is revealed by plateaus in the two-terminal conductance which appear in magnetic fields as lowdoi:10.1098/rsta.2010.0226 pmid:21041221 fatcat:azy343kdfneqrogr55a77awap4