The Pauli susceptibility of the A3C60
compounds has been calculated for a multi-band Hubbard model,
using a diffusion lattice Monte Carlo method (
Phys. Rev. B 55 , R10165 (1997). It was found that
many-body effects enhance the susceptibility by about a factor of
three. This is one of the few examples where many-body effects
are unambiguously found, although these systems are expected to
be strongly correlated. From the calculated susceptibility enhancement
and experimental values, the
density of states can be estimated.
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