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Abstract:
In the ten years since 1979 when superconductivity was discovered below
Tccong0.6 K for the compound CeCu 2Si 2. Heavy-fermion systems have
provided a number of exciting phenomena which were quite unexpected
within traditional concepts of metal physics. They allow one to
investigate, for example, how band magnetism develops in a material
characterized at elevated temperatures by a dense array of local
moments. In addition, they are ideal testing grounds for models
concerned with superconductivity in strongly correlated electron systems
and they may have some impact on the future understanding of the
phenomenon of high- Tc superconductivity in Cu-oxides.
