Metal-insulator transitions in the kondo insulator FeSi and classic semiconductors are similar
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 ≤ 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. © 1997 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
DiTusa, J., Friemelt, K., Bucher, E., Aeppli, G., & Ramirez, A. (1997). Metal-insulator transitions in the kondo insulator FeSi and classic semiconductors are similar. Physical Review Letters, 78 (14), 2831-2834. https://doi.org/10.1103/PhysRevLett.78.2831