  Thermoelectric properties of single crystal Ta2PdSe6 is investigated by means
of transport measurements, and a density functional calculation. We found a
giant Peltier conductivity of 100 Acm-1K-1 at 10 K and successfully explained
it by means of conventional semiconductor theory. We concluded that an
uncompensated semimetal, high mobility, and heavy effective mass are
responsible for the giant Peltier conductivity. Our finding opens a new ground
in the field of thermoelectrics to explore much better semimetals for a new
possible application such as an electric current generator for a
superconducting magnet.
