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Abstract:
Both in the class of strongly correlated electron systems and in the
class of cage compounds representatives with appealing thermoelectric
properties exist. The former ones are characterized by large thermopower
values, the latter ones show low and "glass-like" phonon thermal
conductivities. The combination of both properties within a single
compound, however, has proven challenging. We review some of our recent
investigations on various cage compounds containing rare-earth elements
as guest atoms and discuss their potential for thermoelectric
applications. Strong correlation effects have been observed in a number
of cage compounds containing Ce. While the thermoelectric performance of
some of these is promising, further optimization will be needed to bring
these materials to practical use.
