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- W2085453044 abstract "We present analytical expressions for the current-current correlation function in graphene for arbitrary frequency, wave vector, doping, and band gap induced by a mass term. In the static limit we analyze the Landau (orbital) and Pauli magnetization, as well as the Lindhard correction which describes Friedel and RKKY oscillations. In the nonrelativistic limit we compare our results with the situation of the usual two-dimensional electron gas (2DEG). We find that the orbital magnetic susceptibility (OMS) in gapped graphene is smeared out on an energy scale given by the inverse mass. The nonrelativistic limit of the plasmon dispersion and the Lindhard function reproduces the results of the 2DEG. The same conclusion is true for the Pauli part of the susceptibility. The peculiar band structure of gapped graphene leads to pseudospin paramagnetism and thus to a special form of the OMS." @default.
- W2085453044 created "2016-06-24" @default.
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- W2085453044 date "2011-06-09" @default.
- W2085453044 modified "2023-09-24" @default.
- W2085453044 title "Dynamical current-current susceptibility of gapped graphene" @default.
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- W2085453044 doi "https://doi.org/10.1103/physrevb.83.235409" @default.
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