Graphene transport at high carrier densities using a polymer electrolyte gate

  title={Graphene transport at high carrier densities using a polymer electrolyte gate},
  author={Alexandre Jean Pachoud and Mangesh Jaiswal and Priscilla Kailian Ang and Kian Ping Loh and Barbaros {\"O}zyilmaz},
  journal={EPL (Europhysics Letters)},
We report the study of graphene devices in Hall-bar geometry, gated with a polymer electrolyte. High densities of 6×1013/cm2 are consistently reached, significantly higher than with conventional back-gating. The mobility follows an inverse dependence on density, which can be correlated to a dominant scattering from weak scatterers. Furthermore, our measurements show a Bloch-Grüneisen regime until 100 K (at 6.2×1013/cm2), consistent with an increase of the density. Ubiquitous in our experiments… 

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