Thermoelectric power in transition-metal monosilicides

Akihiro Sakai; Fumiyuki Ishii; Yoshinori Onose; Yasuhide Tomioka; Satoshi Yotsuhashi; Hideaki Adachi; Naoto Nagaosa; Yoshinori Tokura

doi:10.1143/JPSJ.76.093601

Thermoelectric power in transition-metal monosilicides

Akihiro Sakai, Fumiyuki Ishii, Yoshinori Onose, Yasuhide Tomioka, Satoshi Yotsuhashi, Hideaki Adachi, Naoto Nagaosa, Yoshinori Tokura

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

We study, both experimentally and theoretically, temperature and electron-density (band-filling) dependence of Seebeck coefficient in B20-type transition-metal monosilicides to critically study the validity of the Boltzmann transport theory based on the band structure as a guiding principle for the materials design of metallic thermoelectric compounds. The global thermoelectric phase diagram for a wide range of materials (CrSi-MnSi-FeSi-CoSi-Co _0.85Ni_0.15Si and their interpolating solid solutions) is obtained. Theoretical results derived from the calculated band structure can reproduce a global feature of experimental results except the higher temperature region of FeSi, providing the firm basis to understand the systematics of thermoelectricity in metallic compounds including the role of electron correlation and to develop the material design for larger thermoelectricity.

Original language	English
Article number	093601
Journal	journal of the physical society of japan
Volume	76
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.76.093601
Publication status	Published - 2007 Sept
Externally published	Yes

Keywords

B20
Band filling
First-principle calculation
Monosilicide
Pseudogap
Thermopower

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.76.093601

Cite this

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title = "Thermoelectric power in transition-metal monosilicides",

abstract = "We study, both experimentally and theoretically, temperature and electron-density (band-filling) dependence of Seebeck coefficient in B20-type transition-metal monosilicides to critically study the validity of the Boltzmann transport theory based on the band structure as a guiding principle for the materials design of metallic thermoelectric compounds. The global thermoelectric phase diagram for a wide range of materials (CrSi-MnSi-FeSi-CoSi-Co 0.85Ni0.15Si and their interpolating solid solutions) is obtained. Theoretical results derived from the calculated band structure can reproduce a global feature of experimental results except the higher temperature region of FeSi, providing the firm basis to understand the systematics of thermoelectricity in metallic compounds including the role of electron correlation and to develop the material design for larger thermoelectricity.",

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AU - Sakai, Akihiro

AU - Ishii, Fumiyuki

AU - Onose, Yoshinori

AU - Tomioka, Yasuhide

AU - Yotsuhashi, Satoshi

AU - Adachi, Hideaki

AU - Nagaosa, Naoto

AU - Tokura, Yoshinori

PY - 2007/9

Y1 - 2007/9

N2 - We study, both experimentally and theoretically, temperature and electron-density (band-filling) dependence of Seebeck coefficient in B20-type transition-metal monosilicides to critically study the validity of the Boltzmann transport theory based on the band structure as a guiding principle for the materials design of metallic thermoelectric compounds. The global thermoelectric phase diagram for a wide range of materials (CrSi-MnSi-FeSi-CoSi-Co 0.85Ni0.15Si and their interpolating solid solutions) is obtained. Theoretical results derived from the calculated band structure can reproduce a global feature of experimental results except the higher temperature region of FeSi, providing the firm basis to understand the systematics of thermoelectricity in metallic compounds including the role of electron correlation and to develop the material design for larger thermoelectricity.

AB - We study, both experimentally and theoretically, temperature and electron-density (band-filling) dependence of Seebeck coefficient in B20-type transition-metal monosilicides to critically study the validity of the Boltzmann transport theory based on the band structure as a guiding principle for the materials design of metallic thermoelectric compounds. The global thermoelectric phase diagram for a wide range of materials (CrSi-MnSi-FeSi-CoSi-Co 0.85Ni0.15Si and their interpolating solid solutions) is obtained. Theoretical results derived from the calculated band structure can reproduce a global feature of experimental results except the higher temperature region of FeSi, providing the firm basis to understand the systematics of thermoelectricity in metallic compounds including the role of electron correlation and to develop the material design for larger thermoelectricity.

KW - B20

KW - Band filling

KW - First-principle calculation

KW - Monosilicide

KW - Pseudogap

KW - Thermopower

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Thermoelectric power in transition-metal monosilicides

Abstract

Keywords

ASJC Scopus subject areas

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