| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-03-29 |
| タイトル |
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タイトル |
Effects of Oxygen on Lattice Defects in Single-Crystalline Mg2Si Thermoelectrics |
| 言語 |
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言語 |
eng |
| キーワード |
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主題Scheme |
Other |
|
主題 |
Mg2Si single crystals |
| キーワード |
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主題Scheme |
Other |
|
主題 |
lattice defects |
| キーワード |
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主題Scheme |
Other |
|
主題 |
electronic structure calculations |
| キーワード |
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主題Scheme |
Other |
|
主題 |
photoelectron holography |
| 資源タイプ |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
open access |
| 著者 |
Hayashi, Kei
Kawamura, Sota
橋本, 由介
Akao, Noboru
Huang, Zhicheng
Saito, Wataru
Tasaki, Kaichi
Hayashi, Koichi
松下, 智裕
Miyazaki, Yuzuru
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Lattice defect engineering has attracted attention due to its ability to develop thermoelectric materials with low thermal conductivity. For Mg2Si single crystals (SCs), Si vacancy (VSi) defects can be introduced and consequently result in the formation of dislocation cores. These lattice defects confer Mg2Si SCs with a lower thermal conductivity compared to Mg2Si polycrystals. To reveal a mechanism for the stabilisation of VSi in the Mg2Si SCs, we investigated the effects of oxygen (O) on lattice defects by performing electronic structure calculations, secondary ion mass spectrometry, X-ray photoelectron spectroscopy, and photoelectron holography. On the basis of these calculations, we predicted that O stabilised the formation of VSi when it was located at the Si site or at an interstitial site. All experiments confirmed the presence of O inside the Mg2Si SCs. However, O was suggested to be located not at the specific site in the crystal lattice of Mg2Si but at dislocation cores. The interaction between O and the dislocation cores in the Mg2Si SC is expected to immobilise dislocation cores, leading to the stabilisation of VSi formation. |
| 書誌情報 |
en : Nanomaterials
巻 13,
号 7,
発行日 2023-03-30
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| 出版者 |
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出版者 |
MDPI |
| ISSN |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
2079-4991 |
| 出版者版DOI |
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関連タイプ |
isReplacedBy |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.3390/nano13071222 |
| 出版者版URI |
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関連タイプ |
isReplacedBy |
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識別子タイプ |
URI |
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関連識別子 |
https://www.mdpi.com/2079-4991/13/7/1222 |
| 権利 |
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権利情報Resource |
https://creativecommons.org/licenses/by/4.0/ |
|
権利情報 |
$00A9 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| 著者版フラグ |
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出版タイプ |
NA |
