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. 2016 Jul 21;113(31):8583–8588. doi: 10.1073/pnas.1605982113

Fig. S2.

Fig. S2.

MIM images at different top-gate voltages. (A) MIM-Im and (B) MIM-Re images on the same area of the device as in Fig. 2A. The features are similar to that of the back-gated data. As VTG increases from −2 V to 1.6 V, MIM-Im signals increase monotonically, whereas MIM-Re signals reach a peak around VTG = 1.5 V and then diminish. The bright edges are also observed at low VTG before the bulk becomes conductive. Significant electrical inhomogeneity is visualized, as well, before the saturation of MIM signals.