| Issue |
Europhys. Lett.
Volume 51, Number 5, September I 2000
|
|
|---|---|---|
| Page(s) | 557 - 563 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00374-9 | |
| Published online | 01 September 2002 | |
Thermopower in the regime of strong Hubbard correlations in FeSi
1
Low Temperatures Laboratory, General Physics Institute RAS
Vavilov str., 38, 117942 Moscow, Russia
2
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit
Leuven Celestijnenlaan 200 D, B-3001 Leuven, Belgium
3
Van der Waals-Zeeman Laboratory, University of Amsterdam Valckenierstraat
67, 1018 XE Amsterdam, The Netherlands
Received:
5
April
2000
Accepted:
5
July
2000
The Seebeck coefficient anomalies in the so-called Kondo-insulator compound FeSi have been studied at liquid helium and intermediate temperatures. It is shown that the most complete and consistent interpretation of the iron monosilicide magnetic, transport and optical properties can be achieved in the framework of the Hubbard model. The estimation of microscopic parameters provides additional arguments in favour of the spin polarons formation and dramatic renormalization of the intragap electronic density in FeSi at low temperatures.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 2000
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