Title

Metal-insulator transitions in the kondo insulator FeSi and classic semiconductors are similar

Document Type

Article

Publication Date

4-7-1997

Abstract

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

First Page

2831

Last Page

2834

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