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- W2949963797 abstract "We present a systematic study of the electronic, transport and optical properties of disordered graphene including the next-nearest-neighbor hopping. We show that this hopping has a nonnegligible effect on resonant scattering but is of minor importance for long-range disorder such as charged impurities, random potentials or hoppings induced by strain fluctuations. Different types of disorder can be recognized by their fingerprints appearing in the dc conductivity, carrier mobility, optical spectroscopy and Landau level spectrum. By matching our calculations to the experimental observations, we conclude that the long-range disorder potential induced by strain is the most important source of disorder in high-quality graphene on a substrate. PACS numbers: 72.80.Rj; 73.20.Hb; 73.61.Wp The dominant source of disorder which limits the transport and optical properties of graphene is still under debate. Different mechanisms have been proposed and investigated intensively, including charged impurities, random strain fluctuations and resonant scatterers (for reviews see Refs. 1 and 2). Early on, charged impurities (CI) have been recognized as the dominate disorders due to graphene’s unusual linear carrier-densitydependent conductivity. However, this mechanism does not explain the experimental observations that the transport properties are not sensitive to the substrate screening [3, 4]. On the other hand, charge inhomogeneities due to strain fluctuations (SF) form electron-hole puddles [5– 7] and there is experimental evidence, based on the correlation between the carrier mobility and the width of the resistance peak around charge neutrality, that the longrange disorder potential (LRDP) due to SF could be the" @default.
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- W2949963797 date "2015-03-09" @default.
- W2949963797 modified "2023-09-27" @default.
- W2949963797 title "Fingerprints of Disorder Source in Graphene" @default.
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