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Contribution of Domain Walls to the Seebeck Coefficient in the Organic Dirac Electron System α-(BEDT-TTF)2I3
http://hdl.handle.net/2237/0002013688
http://hdl.handle.net/2237/0002013688da86417c-79e1-4fdb-b11a-1a371dfe2205
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
71469.pdf (787 KB)
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| アイテムタイプ | itemtype_ver1(1) | |||||||||
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| 公開日 | 2025-12-01 | |||||||||
| タイトル | ||||||||||
| タイトル | Contribution of Domain Walls to the Seebeck Coefficient in the Organic Dirac Electron System α-(BEDT-TTF)2I3 | |||||||||
| 言語 | en | |||||||||
| 著者 |
Yamamoto, Daiki
× Yamamoto, Daiki
× Kobayashi, Akito
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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 ©2025 The Physical Society of Japan 日本物理学会 | |||||||||
| 言語 | en | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | The discovery of gap suppression determined from electrical resistivity in the charge-ordered phase of α-(BEDT-TTF)2I3 by Liu et al. has attracted the interest of researchers. Ohki et al. explained this unusual behavior by numerical calculations considering a single domain wall. Meanwhile, Kitamura et al. found that the temperature dependence of the Seebeck coefficient shows a characteristic behavior. However, in previous theoretical studies of α-(BEDT-TTF)2I3, the contribution of the domain walls to the Seebeck coefficient was not calculated. Therefore, we investigated the effect of multiple domain walls on the conductivity and Seebeck coefficient using the energy eigenvalues and eigenvectors obtained from a two-dimensional (2D) Hamiltonian with multiple domain walls as a superlattice. Here, the order parameter with multiple domain walls was constructed from the single domain wall ground state of the extended Hubbard Hamiltonian with cylindrical boundary conditions. We found that the positive and negative peaks of the Seebeck coefficient due to the two types of domain wall almost cancel each other out, whereas the contributions of the two types of domain wall reinforce each other in the conductivity. This difference consistently explains the behavior of the Seebeck coefficient and conductivity in the charge-ordered phase of α-(BEDT-TTF)2I3. | |||||||||
| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | 日本物理学会 | |||||||||
| 言語 | ja | |||||||||
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| 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 | AM | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||
| 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/10.7566/JPSJ.94.054708 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | PISSN | |||||||||
| 収録物識別子 | 0031-9015 | |||||||||
| 書誌情報 |
en : Journal of the Physical Society of Japan 巻 94, 号 5, p. 054708, 発行日 2025-05-15 |
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