Title

Heavy fermion metal-Kondo insulator transition

Document Type

Article

Publication Date

1-1-1998

Abstract

Doping the Kondo insulator FeSi with Al at the Si site introduces carriers and eventually yields metallic conduction. The lattice constant, thermoelectric effect, Hall effect, electrical conductivity, magnetic susceptibility, specific heat, and magnetoresistance have been measured over the (Formula presented) range of Al concentration. All of these quantities show a systematic variation with x including a metal-insulator transition for carrier densities between (Formula presented) and (Formula presented) A detailed analysis of the transport and thermodynamic properties reveal a metal-insulator transition closely resembling that of the classic semiconductors (Si:P, Si:B, and Ge:Sb) with one important exception: a substantially enhanced carrier mass. © 1998 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review B - Condensed Matter and Materials Physics

First Page

10288

Last Page

10301

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