Insulating behavior in metallic bilayer graphene: Interplay between density inhomogeneity and temperature

Details Insulating behavior in metallic bilayer graphene: Interplay between density inhomogeneity and temperature Insulating behavior in metallic bilayer graphene: Interplay between density inhomogeneity and temperature

2010-06-09

arxiv.org/abs/1006.1897v1

Phys. Rev. B 82, 081409(R) (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.82.081409

We investigate bilayer graphene transport in the presence of electron-hole puddles induced by long-range charged impurities in the environment. We explain the insulating behavior observed in the temperature dependent conductivity of low mobility bilayer graphene using an analytic statistical theory taking into account the non-mean-field nature of transport in the highly inhomogeneous density and potential landscape. We find that the puddles can induce, even far from the charge neutrality point, a coexisting metallic and insulating transport behavior due to the random local activation gap in the system.

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