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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5

http://hdl.handle.net/10191/47682
http://hdl.handle.net/10191/47682
f2b5c2d1-a770-4a95-9584-b5fb469096d7
名前 / ファイル ライセンス アクション
85_053703.pdf 85_053703.pdf (2.3 MB)
Item type 学術雑誌論文 / Journal Article(1)
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
言語 en
タイトル FFLO Excitonic State in the Three-Chain Hubbard Model for Ta_2NiSe_5
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

WEKO 7084

Yamada, Takemi

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Domon, Kaoru

× Domon, Kaoru

WEKO 7085

Domon, Kaoru

Search repository
Ono, Yoshiaki

× Ono, Yoshiaki

WEKO 62

Ono, Yoshiaki

Search repository
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
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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