Reconstruction of the occupied and unoccupied electronic states driven by quantum charge fluctuations in electron doped cuprate superconductors

[2505.12639] Reconstruction of the occupied and unoccupied electronic states driven by quantum charge fluctuations in electron doped cuprate superconductors Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Strongly Correlated Electrons arXiv:2505.12639 (cond-mat) [Submitted on 19 May 2025 ( v1 ), last revised 14 Apr 2026 (this version, v4)] Title: Reconstruction of the occupied and unoccupied electronic states driven by quantum charge fluctuations in electron doped cuprate superconductors Authors: Hiroshi Yamaguchi , Yudai Miyai , Yuki. Tsubota , Masashi Atira , Hitoshi Sato , Dongjoon Song , Kiyoshia Tanaka , Kenya Shimada , Shin-ichiro Ideta View a PDF of the paper titled Reconstruction of the occupied and unoccupied electronic states driven by quantum charge fluctuations in electron doped cuprate superconductors, by Hiroshi Yamaguchi and 7 other authors View PDF Abstract: The origin of electron-boson interactions is central to understanding high-$T_c$ superconductivity in cuprates. While phonons and magnetic fluctuations are widely considered as candidates for mediating electron pairing, the role of charge fluctuations -- one of the fundamental electronic degrees of freedom -- remains unclear. Here, we investigate the electronic structure of the electron-doped cuprate Nd$_{2-x}$Ce$_x$CuO$_4$ using angle-resolved photoemission spectroscopy and angle-resolved inverse photoemission spectroscopy, which reveal the occupied and unoccupied states, respectively. We identify emergent spectral features on both occupied and unoccupied states that are consistent with excitations driven by quantum charge fluctuations. The results obtained in this study offer direct experimental insight into charge fluctuations in cuprates, thereby paving the way towards clarifying their fine electronic structure and the mechanism of high-$T_c$ superconductivity. Comments: 5 figures Subjects: Strongly Correlated Electrons (cond-mat.str-el) Cite as: arXiv:2505.12639 [cond-mat.str-el] (or arXiv:2505.12639v4 [cond-mat.str-el] for this version) https://doi.org/10.48550/arXiv.2505.12639 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Shin-Ichiro Ideta [ view email ] [v1] Mon, 19 May 2025 02:46:16 UTC (968 KB) [v2] Tue, 20 May 2025 03:27:04 UTC (2,483 KB) [v3] Thu, 22 May 2025 09:32:34 UTC (17,480 KB) [v4] Tue, 14 Apr 2026 08:03:33 UTC (1,113 KB) Full-text links: Access Paper: View a PDF of the paper titled Reconstruction of the occupied and unoccupied electronic states driven by quantum charge fluctuations in electron doped cuprate superconductors, by Hiroshi Yamaguchi and 7 other authors View PDF view license Current browse context: cond-mat.str-el < prev | next > new | recent | 2025-05 Change to browse by: cond-mat References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... 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