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Effect of Cu intercalation and pressure on excitonic interaction in 1T−TiSe2
http://hdl.handle.net/2237/00030495
http://hdl.handle.net/2237/00030495cf372ce9-97bb-4e74-9e13-d6fe2a921229
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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.× Nakano, A.× Kobayashi, S.× Sugawara, K.× Katayama, N.× Maejima, N.× Machida, A.× Watanuki, T.× Ichimura, K.× Tanda, S.× Nakamura, T.× 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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著者版フラグ | ||||||
値 | publisher |