The JahnTeller effect has been studied for
the photoemission from negatively
charged C60 molecules
(Phys. Rev. Lett. 47, 1875 (1995)).
It was found that the JahnTeller effect strongly influences the
estimates of the electronphonon interaction.
The influence of the JahnTeller effect on the effective Coulomb
interaction has been studied
( Phys. Rev. B 51, 3493 (1995)).
It was found that
for this property the system behaves essentially as being in
the strong coupling limit.
The gfactor has been investigated
( Phys. Rev. B 54, 17184 (1995)).
The orbital moment has a large contribution from the l=5 character
of the orbital,
but is reduced by the JahnTeller effect due to a Ham factor.
The effective spinorbit coupling, which couples the orbital and spin
moments, is drastically reduced by the small C60
curvature. An effective gfactor substantially smaller than 2 is
expected for the free molecule.
The (dynamical) JahnTeller effect is found to play an essential role for
the metalinsulator transition in
AnC60. In particular,
the JahnTeller effect is responsible for the
A4C60 being nonmmagnetic.
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