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 | Mishchenko, Eugene | Charge response function and a novel plasmon mode in graphene | Polarizability of noninteracting 2D Dirac electrons has a 1 1 / √qv-ω singularity at the boundary of electron-hole excitations. The screening of this singularity by long-range electron-electron interactions is usually treated within the random phase approximation. The latter is exact only in the ... | Excitons; Random phase approximation | 2008-04 |
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