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FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5
http://hdl.handle.net/10191/47682
http://hdl.handle.net/10191/47682f2b5c2d1-a770-4a95-9584-b5fb469096d7
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
85_053703.pdf (2.3 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-07-18 | |||||
| タイトル | ||||||
| タイトル | FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5 | |||||
| タイトル | ||||||
| タイトル | FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5 | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Yamada, Takemi
× Yamada, Takemi× Domon, Kaoru× Ono, Yoshiaki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The three-chain Hubbard model for Ta_2NiSe_5, known as a candidate material for an excitonic insulator, is investigated over the wide range of the energy gap D between the twofold degenerate conduction bands and the nondegenerate valence band including both semiconducting (D > 0) and semimetallic (D < 0) cases. In the semimetallic case, the difference in the band degeneracy inevitably causes the imbalance of each Fermi wavenumber, resulting in a remarkable excitonic state characterized by the condensation of excitons with finite center-of-mass momentum q, the so-called Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) excitonic state. With decreasing D corresponding to increasing pressure, the obtained excitonic phase diagram shows a crossover from BEC (D >__～ 0) to BCS (D <__～ 0) regime, and then shows a distinct phase transition at a certain critical value D_c(< 0) from the uniform (q = 0) to the FFLO (q ≠ 0) excitonic state, as expected to be observed in Ta_2NiSe_5 under high pressure. | |||||
| 書誌情報 |
Journal of the Physical Society of Japan en : Journal of the Physical Society of Japan 巻 85, 号 5, p. 053703-1-053703-5, 発行日 2016-04 |
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| 出版者 | ||||||
| 出版者 | The Physical Society of Japan | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00319015 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00704814 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.7566/JPSJ.85.053703 | |||||
| 権利 | ||||||
| 権利情報 | Copyright (C) 2016 The Physical Society of Japan | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
| 異版である | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://journals.jps.jp/doi/abs/10.7566/JPSJ.85.053703 | |||||
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Cite as
Yamada, Takemi, Domon, Kaoru, Ono, Yoshiaki, 2016, FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5: The Physical Society of Japan, 053703-1-053703-5 p.
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