2018年6月1日
Thermoelectric Properties for a Suspended Microribbon of Quasi-One-Dimensional TiS3
Journal of Electronic Materials
- ,
- ,
- ,
- 巻
- 47
- 号
- 6
- 開始ページ
- 3177
- 終了ページ
- 3183
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s11664-018-6086-z
- 出版者・発行元
- Springer New York LLC
Transition-metal trichalcogenides MX3 (M = Ti, Zr, Nb, Ta
X = S, Se) are well-known inorganic quasi-one-dimensional conductors. Among them, we have investigated the thermoelectric properties of titanium trisulfide TiS3 microribbon. The electrical resistivity ρ, thermal conductivity κ, and thermoelectric power S were measured using 3ω method. The weight mean values were found to be ρ = 5 mω m and κ = 10 W K−1 m−1 along the one-dimensional direction (b-axis) of the TiS3 microribbon. Combined with the thermoelectric power S = −530 μV K−1, the figure of merit was calculated as ZT = 0.0023. This efficiency is the same as that of randomly oriented bulk TiS3. We also estimated the anisotropy of σ and κ using the present results and those for randomly oriented bulk material. The obtained weak anisotropy for TiS3 is attributable to strong coupling between triangular columns consisting of TiS3 units. These experimental results are consistent with theoretical results obtained using density functional theory (DFT) calculations.
X = S, Se) are well-known inorganic quasi-one-dimensional conductors. Among them, we have investigated the thermoelectric properties of titanium trisulfide TiS3 microribbon. The electrical resistivity ρ, thermal conductivity κ, and thermoelectric power S were measured using 3ω method. The weight mean values were found to be ρ = 5 mω m and κ = 10 W K−1 m−1 along the one-dimensional direction (b-axis) of the TiS3 microribbon. Combined with the thermoelectric power S = −530 μV K−1, the figure of merit was calculated as ZT = 0.0023. This efficiency is the same as that of randomly oriented bulk TiS3. We also estimated the anisotropy of σ and κ using the present results and those for randomly oriented bulk material. The obtained weak anisotropy for TiS3 is attributable to strong coupling between triangular columns consisting of TiS3 units. These experimental results are consistent with theoretical results obtained using density functional theory (DFT) calculations.
- リンク情報
- ID情報
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- DOI : 10.1007/s11664-018-6086-z
- ISSN : 0361-5235
- SCOPUS ID : 85045136366
- Web of Science ID : WOS:000431920400017