| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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タイトル |
Structural, transport, and thermal properties of the single-crystalline type-VIII clathrate Ba8Ga16Sn30 |
|
言語 |
en |
| 作成者 |
Huo, Dexuan
Sakata, Takeaki
Sasakawa, Tetsuya
Avila, M. A.
Tsubota, Masami
Iga, Fumitoshi
Fukuoka, Hiroshi
Yamanaka, Shoji
Aoyagi, S.
Takabatake, Toshiro
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 2006 American Physical Society |
| 主題 |
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主題Scheme |
NDC |
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主題 |
420 |
| 内容記述 |
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内容記述 |
We report the electrical resistivity rho, Hall coefficient RH, thermoelectric power S, specific heat C, and thermal conductivity kappa on single crystals of the type-VIII clathrate Ba8Ga16Sn30 grown from Sn-flux. Negative S and RH over a wide temperature range indicate that electrons dominate electrical transport properties. Both rho(T) and S(T) show typical behavior of a heavily doped semiconductor. The absolute value of S increases monotonically to 243 µV/K with increasing temperature up to 550 K. The large S may originate from the low carrier concentration n = 3.7×1019 cm–3. Hall mobility µH shows a maximum of 62 cm2/V s around 70 K. The analysis of temperature dependence of µH suggests a crossover of a dominant scattering mechanism from ionized impurity to acoustic phonon scattering with increasing temperature. The existence of local vibration modes of Ba atoms in cages composed of Ga and Sn atoms is evidenced by analysis of experimental data of structural refinement and specific heat, which give an Einstein temperature of 50 K and a Debye temperature of 200 K. This local vibration of Ba atoms should be responsible for the low thermal conductivity (1.1 W/m K at 150 K). The potential of type-VIII clathrate compounds for thermoelectric application is discussed. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.71.075113 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.71.075113 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1098-0121 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11187113 |
| 開始ページ |
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開始ページ |
075113 |
| 書誌情報 |
Physical Review B
Physical Review B
巻 71,
p. 075113,
発行日 2005
|
| 旧ID |
14997 |
PhysRevB075113.pdf (277.6 KB)
