Dielectric screening in doped Fullerides

Erik Koch; Olle Gunnarsson; Richard M. Martin

doi:10.1063/1.56505

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Dielectric screening in doped Fullerides

Erik Koch·Olle Gunnarsson·Richard M. Martin

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Abstract

For conventional superconductors the electron-electron interaction is strongly reduced by retardation effects, making the formation of Cooper pairs possible. In the alkali-doped Fullerides, however, there are no strong retardation effects. But dielectric screening can reduce the electron-electron interaction sufficiently, if we assume that the random-phase approximation (RPA) is valid. It is not clear, however, if this assumption holds, since the alkali-doped Fullerides are strongly correlated systems close to a Mott transition. To test the validity of the RPA for these systems we have calculated the screening of a test charge using quantum Monte Carlo.

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Erik Koch, Olle Gunnarsson, Richard M. Martin. 1998-04-07. Dielectric screening in doped Fullerides. https://doi.org/10.1063/1.56505

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