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Hard x-ray photoemission spectroscopy of rhenium substituted higher manganese silicides

Authors :
Tsunehiro Takeuchi
T. Iizuka
Hidetoshi Miyazaki
Swapnil Ghodke
Masaharu Matsunami
Akio Yamamoto
Source :
Journal of Applied Physics. 127:035103
Publication Year :
2020
Publisher :
AIP Publishing, 2020.

Abstract

We have investigated the electronic structure of a potential thermoelectric material, higher manganese silicide, and its solid solutions with supersaturated Re by means of hard x-ray photoemission spectroscopy. The unusual Re substitution dependence of thermoelectric properties in the higher manganese silicide, reducing the electrical resistivity without altering the Seebeck coefficient, can be explained in terms of the variation of the density of states at the Fermi level and its energy derivative. Such an electronic structure variation contributes to an improvement in the thermoelectric performance in combination with the suppressed thermal conductivity.

Details

ISSN :
10897550 and 00218979
Volume :
127
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........d88d616d176bab34473203f31017a751
Full Text :
https://doi.org/10.1063/1.5128185