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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Effect of Cu intercalation and pressure on excitonic interaction in 1T−TiSe2

http://hdl.handle.net/2237/00030495
http://hdl.handle.net/2237/00030495
cf372ce9-97bb-4e74-9e13-d6fe2a921229
名前 / ファイル ライセンス アクション
PhysRevB99_104109.pdf PhysRevB99_104109.pdf (2.4 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2019-07-03
タイトル
タイトル Effect of Cu intercalation and pressure on excitonic interaction in 1T−TiSe2
言語 en
著者 Kitou, S.

× Kitou, S.

WEKO 92389

en Kitou, S.

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Nakano, A.

× Nakano, A.

WEKO 92390

en Nakano, A.

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Kobayashi, S.

× Kobayashi, S.

WEKO 92391

en Kobayashi, S.

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Sugawara, K.

× Sugawara, K.

WEKO 92392

en Sugawara, K.

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Katayama, N.

× Katayama, N.

WEKO 92393

en Katayama, N.

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Maejima, N.

× Maejima, N.

WEKO 92394

en Maejima, N.

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Machida, A.

× Machida, A.

WEKO 92395

en Machida, A.

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Watanuki, T.

× Watanuki, T.

WEKO 92396

en Watanuki, T.

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Ichimura, K.

× Ichimura, K.

WEKO 92397

en Ichimura, K.

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Tanda, S.

× Tanda, S.

WEKO 92398

en Tanda, S.

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Nakamura, T.

× Nakamura, T.

WEKO 92399

en Nakamura, T.

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Sawa, H.

× Sawa, H.

WEKO 92400

en Sawa, H.

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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
言語 en
権利情報 © 2019 American Physical Society
抄録
内容記述 1T -TiSe2 has a semimetallic band structure at room temperature and undergoes phase transition to a triple-q charge-density wave (CDW) state with a commensurate superlattice structure (2a × 2a × 2c) below Tc ≈ 200K at ambient pressure. This phase transition is caused by cooperative phenomena involving electron-phonon and electron-hole (excitonic) interactions, and cannot be described by a standard CDW framework. By Cu intercalation or the application of pressure, this phase-transition temperature is suppressed and superconductivity (SC) appears. However, it is not clear what kind of order parameters are affected by these two procedures. We investigated the crystal structure of CuxTiSe2 and pressurized 1T-TiSe2 around the SC state by synchrotron x-ray diffraction on single crystals. In the high-temperature phase, the variations of structural parameters for the case of Cu intercalation and application of pressure are considerably different. Moreover, the relationship between the critical points of the CDW phase transition and the SC dome are also different for the two cases. The excitonic interaction appears to play an important role in the P-T phase diagram of 1T-TiSe2, but not in the x-T phase diagram.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 American Physical Society
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
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1103/PhysRevB.99.104109
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 2469-9950
書誌情報 en : Physical Review B

巻 99, 号 10, p. 104109, 発行日 2019-03-28
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