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dc.contributor.author장차운-
dc.contributor.authorS. Adam-
dc.contributor.authorJ.-H. Chen-
dc.contributor.authorE. D.Williams-
dc.contributor.authorS. Das Sarma-
dc.contributor.authorM. S. Fuhrer-
dc.date.accessioned2015-12-03T00:56:44Z-
dc.date.available2015-12-03T00:56:44Z-
dc.date.issued200810-
dc.identifier.citationVOL 101, NO 14, 146805-1-146805-4-
dc.identifier.issn00319007-
dc.identifier.other39178-
dc.identifier.urihttp://pubs.kist.re.kr/handle/201004/44672-
dc.description.abstractWe reduce the dimensionless interaction strength α 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.-
dc.publisherPhysical review letters-
dc.titleTuning the effective fine structure constant in graphene: opposing effects of dielectric screening on short-and long-range potential scattering-
dc.typeArticle-
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