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Evolution of the Optical Response from a Very Narrow Gap Semiconductor to a Metallic Material in (FexMn1−x)Si

Published online by Cambridge University Press:  15 February 2011

S. Bocellip
Affiliation:
INFM - Dipartimento di Fisica “A.Volta”, Università di Pavia, Via Bassi 6,1-27100 Pavia, Italy
F. Marabelli
Affiliation:
INFM - Dipartimento di Fisica “A.Volta”, Università di Pavia, Via Bassi 6,1-27100 Pavia, Italy
R. Spolenak
Affiliation:
INFM - Dipartimento di Fisica “A.Volta”, Università di Pavia, Via Bassi 6,1-27100 Pavia, Italy Institut für Experimentalphysysik, Technical University Vienna, A-1040 Wien, Austria
E. Bauer
Affiliation:
Institut für Experimentalphysysik, Technical University Vienna, A-1040 Wien, Austria
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Abstract

A study of the electrical resisitivity of (Fex.Mn1−x)Si with 0 < x < 1 indicates a crossover from an almost semiconducting state in FeSi to a metallic one in MnSi. Optical measurements show that the electronic structure and the vibrational behaviour appears to be essentially uneffected by the Fe/Mn substitution. Instead, a change of the free carrier density occurs, yielding a temperature and stoichiometry dependent plasma frequency.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

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