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 Locationhttps://doi.org/10.1021/nl4002052
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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