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Evolution of band structure in a kagome superconductor Cs(V1-xCrx)3Sb5: toward universal understanding of CDW and superconducting phase diagrams
https://repo.qst.go.jp/records/2001336
https://repo.qst.go.jp/records/20013360e8a2152-64c0-4d47-a1de-28c88e1d8e49
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||||||||||||||
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| 公開日 | 2024-10-18 | |||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||
| タイトル | Evolution of band structure in a kagome superconductor Cs(V1-xCrx)3Sb5: toward universal understanding of CDW and superconducting phase diagrams | |||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||
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| 言語 | eng | |||||||||||||||||||||||||||||
| 資源タイプ | ||||||||||||||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||||||||||||||
| 著者 |
Shuto Suzuki(Tohoku Univ.)
× Shuto Suzuki(Tohoku Univ.)
× Takemi Kato(WPI-AIMR.Tohoku Univ.)
× Kosuke Nakayama(Tohoku Univ.)
× Zhiwei Wang(Beijing Institute of Technology)
× Seigo Souma(WPI-AIMR.Tohoku Univ.)
× Kenichi Ozawa(KEK)
× Kitamura Miho
× Horiba Koji
× Hiroshi Kumigashira(IMRAM.Tohoku Univ.)
× Takashi Takahashi(Tohoku Univ.)
× Yugui Yao(Beijing Institute of Technology)
× Takafumi Sato(WPI-AIMR.Tohoku Univ.)
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| 抄録 | ||||||||||||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||||||||||||
| 内容記述 | Kagomesuperconductors AV3Sb5 (A =K,Rb,Cs)exhibitacharacteristicsuperconducting and charge-density wave (CDW) phase diagram upon carrier doping and chemical substitution. However, the key electronic states responsible for such a phase diagram have yet to be clarified. Here we report a systematic microfocused angle-resolved photoemission spectroscopy study of Cs(V1?xCrx)3Sb5 as a function of Cr content x,whereCr substitution causes monotonic reduction of superconducting and CDW transition temperatures. We found that the V-derived bands forming saddle points at the M point and Dirac nodes along high-symmetry cuts show an energy shift due to electron doping by Cr substitution, whereas the Sb-derived electron band at the point remains almost unchanged, signifying an orbital-selective band shift. We also found that band doubling associated with the emergence of three-dimensional CDW identified at x = 0 vanishes at x ? 0.25,inline with the disappearance of CDW. Acomparison of band diagrams among Ti-, Nb-, and Cr-substituted CsV3Sb5 suggests the importance to simultaneously take into account the two saddle points at the M point and their proximity to the Fermi energy, to understand the complex phase diagram against carrier doping and chemical pressure. | |||||||||||||||||||||||||||||
| 書誌情報 |
Physical Review B 巻 110, p. 1-8, 発行日 2024-09 |
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| 出版者 | American Physical Society | |||||||||||||||||||||||||||||
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| 識別子タイプ | DOI | |||||||||||||||||||||||||||||
| 関連識別子 | 10.1103/PhysRevB.110.165104 | |||||||||||||||||||||||||||||
