Ionic screening of charged-impurity scattering in graphene

Fang Chen; Jilin Xia; Nongjian Tao

doi:10.1021/nl803922m

Ionic screening of charged-impurity scattering in graphene

Fang Chen, Jilin Xia, Nongjian Tao

Research output: Contribution to journal › Article › peer-review

149 Scopus citations

Abstract

We have studied the ionic screening effect on the charge transport properties of graphene field effect transistors. By increasing the ionic concentration, we found dramatic increases in the carrier mobilities and systematic changes in the position and magnitude of minimum conductivity, as well as the width of minimum conductivity plateau, which supports the theory of long-range Coulomb scattering. We also observed clear conductivity saturation and systematic crossover from the linear to constant conductivity regimes.

Original language	English (US)
Pages (from-to)	1621-1625
Number of pages	5
Journal	Nano Letters
Volume	9
Issue number	4
DOIs	https://doi.org/10.1021/nl803922m
State	Published - Apr 8 2009

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl803922m

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abstract = "We have studied the ionic screening effect on the charge transport properties of graphene field effect transistors. By increasing the ionic concentration, we found dramatic increases in the carrier mobilities and systematic changes in the position and magnitude of minimum conductivity, as well as the width of minimum conductivity plateau, which supports the theory of long-range Coulomb scattering. We also observed clear conductivity saturation and systematic crossover from the linear to constant conductivity regimes.",

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N2 - We have studied the ionic screening effect on the charge transport properties of graphene field effect transistors. By increasing the ionic concentration, we found dramatic increases in the carrier mobilities and systematic changes in the position and magnitude of minimum conductivity, as well as the width of minimum conductivity plateau, which supports the theory of long-range Coulomb scattering. We also observed clear conductivity saturation and systematic crossover from the linear to constant conductivity regimes.

AB - We have studied the ionic screening effect on the charge transport properties of graphene field effect transistors. By increasing the ionic concentration, we found dramatic increases in the carrier mobilities and systematic changes in the position and magnitude of minimum conductivity, as well as the width of minimum conductivity plateau, which supports the theory of long-range Coulomb scattering. We also observed clear conductivity saturation and systematic crossover from the linear to constant conductivity regimes.

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Ionic screening of charged-impurity scattering in graphene

Abstract

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