Erratum: Observation of the fractional quantum Hall effect in graphene

Nature 462, 196–199 (2009)

In this Letter, an arithmetic error led to the incorrect value to be reported for the activation energy E_A of the gap of the ν = 0 state. The incorrect values for E_A are shown in Fig. 4c and referred to once in the text of the manuscript. A corrected Fig. 4c is shown here. On page 4 of the print and PDF version of the manuscript, the sentence "... with an activation energy E_A ≈ 60 K" should read "... with an activation energy E_A ≈ 240 K"; similarly, the end of the Fig. 4 legend should read E_A ≈ 240 K instead of E_A ≈ 60 K. This does not affect any of the conclusions of the Letter, which is focused on observation of the Fractional Hall Effect in graphene.

Figure 1

This is the corrected Fig. 4c.