Important role of alkali atoms in A4C60

Details Important role of alkali atoms in A4C60 Important role of alkali atoms in A4C60

1997-01-19

arxiv.org/abs/cond-mat/9701132v1

Phys. Rev. B 57, 2159 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, revtex, 2 figures, submitted to Phys. Rev. B more information at http://www.mpi-stuttgart.mpg.de/dokumente/andersen/f

Scientific paper

10.1103/PhysRevB.57.2159

We show that hopping via the alkali atoms plays an important role for the t1u
band of A4C60 (A=K, Rb), in strong contrast to A3C60. Thus the t1u band is
broadened by more than 40 % by the presence of the alkali atoms. The difference
between A4C60 and A3C60 is in particular due to the less symmetric location of
the alkali atoms in A4C60.

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