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- W2067381102 abstract "Going beyond both a simple perturbation theory and Hartree-Fock treatment, we employ the Gutzwiller variational scheme to clarify the possibility of electron pairing in ${mathrm{C}}_{60}$. It is shown that the pairing can be induced by electron-phonon interaction (EPI) rather than the pure electron-electron interaction (EEI), although a perturbation scheme showed that the pairing could be introduced by pure e-e repulsion. EPI can introduce a bipolaron if the on-site EEI U is not too strong. Our result are supported by electron-paramagnetic-resonance (EPR) experiments both in solid and in solution, which evidenced that the disproportional reactions such as ${mathrm{C}}_{60}^{mathrm{ensuremath{-}}}$+${mathrm{C}}_{60}^{mathrm{ensuremath{-}}}$ensuremath{rightarrow}${mathrm{C}}_{60}$+${mathrm{C}}_{60}^{2mathrm{ensuremath{-}}}$ do not occur. From the EPR results we anticipate that the on-site U is larger than 2.0 eV. It can be concluded that the perturbation prediction for small clusters may not hold for some larger clusters." @default.
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- W2067381102 date "1995-08-15" @default.
- W2067381102 modified "2023-09-28" @default.
- W2067381102 title "Pairing inC60: A Gutzwiller approach" @default.
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- W2067381102 doi "https://doi.org/10.1103/physrevb.52.6081" @default.
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