Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1997-01-02
Physics
Condensed Matter
Strongly Correlated Electrons
12 Pages Latex with 3 ps figures
Scientific paper
We have observed the metal-insulator transition in the strongly correlated insulator FeSi with the chemical substitution of Al at the Si site. The magnetic susceptibility, heat capacity, and field dependent conductivity are measured for Al concentrations ranging from 0 to 0.08. For concentrations greater than 0.01 we find metallic properties quantitatively similar to those measured in Si:P with the exception of a greatly enhanced quasiparticle mass. Below 2 K the temperature and field dependent conductivity can be completely described by the theory of disordered Fermi Liquids.
Aeppli Gabriel
Bucher E.
DiTusa J. F.
Friemelt K.
Ramirez Arthur P.
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