A Field-Effect-Transistor from Graphite: No Effect of Low Gate Fields

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Inspired by the striking similarities between the metal-insulator transitions in graphite and Si-MOSFET's and the recent attention to charge doping in carbon-based materials, we have made attempts to fabricate a field-effect transistor based on graphite. A relatively thick layer of boron nitride turned out to be able to serve as a gate dielectric. This, however, limits the achievable electric gate field, which might be the reason for our observation of no charge-doping effect.