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- W2076758859 abstract "We reduce the dimensionless interaction strength $ensuremath{alpha}$ in graphene by adding a water overlayer in ultrahigh vacuum, thereby increasing dielectric screening. The mobility limited by long-range impurity scattering is increased over 30%, due to the background dielectric constant enhancement leading to a reduced interaction of electrons with charged impurities. However, the carrier-density-independent conductivity due to short-range impurities is decreased by almost 40%, due to reduced screening of the impurity potential by conduction electrons. The minimum conductivity is nearly unchanged, due to canceling contributions from the electron-hole puddle density and long-range impurity mobility. Experimental data are compared with theoretical predictions with excellent agreement." @default.
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- W2076758859 date "2008-10-03" @default.
- W2076758859 modified "2023-10-18" @default.
- W2076758859 title "Tuning the Effective Fine Structure Constant in Graphene: Opposing Effects of Dielectric Screening on Short- and Long-Range Potential Scattering" @default.
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- W2076758859 doi "https://doi.org/10.1103/physrevlett.101.146805" @default.
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