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Tunable carrier type and density in graphene/PbZr0.2Ti0.8O3hybrid structures through ferroelectric switching

  • Author(s): Baeumer, C
  • Rogers, SP
  • Xu, R
  • Martin, LW
  • Shim, M
  • et al.

Published Web Location

https://doi.org/10.1021/nl4002052
Abstract

Bidirectional interdependency between graphene doping level and ferroelectric polarization is demonstrated in graphene/PbZr0.2Ti0.8O3hybrid structures. The polarization of the PbZr0.2Ti0.8O3can be effectively switched with graphene electrodes and can in turn alter carrier type and density in the graphene. A complete reversal of the current-voltage hysteresis direction is observed in the graphene when external environmental factors are minimized, converting p-type graphene into n-type with an estimated carrier density change as large as ∼1013cm-2. Nonvolatility and reversibility are also demonstrated. © 2013 American Chemical Society.

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