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Impact of Temperature on Seebeck Coefficient of Nodal Line Semimetal in Molecular Conductor
http://hdl.handle.net/2237/0002011258
http://hdl.handle.net/2237/0002011258426082be-4afd-4286-931a-8cb30393c5ee
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
crystals-14-00601.pdf (1013 KB)
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| アイテムタイプ | itemtype_ver1(1) | |||||||
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| 公開日 | 2024-07-04 | |||||||
| タイトル | ||||||||
| タイトル | Impact of Temperature on Seebeck Coefficient of Nodal Line Semimetal in Molecular Conductor | |||||||
| 言語 | en | |||||||
| 著者 |
Suzumura, Yoshikazu
× Suzumura, Yoshikazu
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| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 権利 | ||||||||
| 権利情報 | Copyright: © 2024 by the author. 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/). | |||||||
| 言語 | en | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | We examine the impact of temperature (T) on the Seebeck coefficient S, i.e., the T dependence of S for a single-component molecular conductor [Pd(dddt)2] (dddt = 5,6-dihydro-1,4-dithiin- 2,3-dithiolate) with a half-filled band, where the coefficient is obtained from a ratio of the thermal conductivity to the electrical conductivity. The present paper demonstrates theoretically the novel result of large anisotropy in the Seebeck coefficient components of three-dimensional Dirac electrons in a molecular conductor. The conductor exhibits a nodal line with the energy variation around the chemical potential and provides the density of states (DOS) with a minimum. Using a threedimensional tight-binding (TB) model in the presence of both impurity and electron–phonon (e–p) scatterings, we study the Seebeck coefficient Sy for the molecular stacking and the most conducting direction. The impact of T on Sy exhibits a sign change, where Sy > 0 with a maximum at high temperatures and Sy < 0 with a minimum at low temperatures. The T dependence of Sy suggests that the contribution from the conduction (valence) band is dominant at low (high) temperatures. Further, it is shown that the the Seebeck coefficient components for perpendicular directions Sx and Sz are much smaller than Sy and present no sign change, in contrast to Sy. These results are analyzed in terms of the spectral conductivity as a function of the energy ϵ close to the chemical potential μ. | |||||||
| 言語 | en | |||||||
| 出版者 | ||||||||
| 出版者 | MDPI | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||||
| タイプ | journal article | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 関連情報 | ||||||||
| 関連タイプ | isVersionOf | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | https://doi.org/10.3390/cryst14070601 | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | EISSN | |||||||
| 収録物識別子 | 2073-4352 | |||||||
| 書誌情報 |
en : Crystals 巻 14, 号 7, p. 601, 発行日 2024-06-28 |
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