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PreprintCC BY 4.0arXiv

Unique Charge-density-wave Order and Fluctuation-induced Phonon Softening in the Optimally-doped Trilayer Cuprate Bi2Sr2Ca2Cu3O10+δ

  • S. Nakata
  • K. Yamamoto
  • J. Okamoto
  • D. Shiga
  • R. Takahashi
  • H. Y. Huang
  • H. Kumigashira
  • H. Wadati
  • A. Fujimori
  • S. Ishida
  • H. Eisaki
  • D. J. Huang
2 more authors
  • J. Miyawaki
  • H. Suzuki
Open at sourcePDFDOICite

Abstract

Charge-density-wave (CDW) order is a ubiquitous feature of cuprate superconductors that competes with superconductivity. However, its behavior remains poorly understood in trilayer compounds, which contain the optimal number of CuO2 layers for superconductivity. Here, we report Cu L3- and O K-edge resonant inelastic x-ray scattering (RIXS) measurements of optimally-doped Bi2Sr2Ca2Cu3O10+δ (Bi2223), the trilayer cuprate with the highest superconducting transition temperature (Tc) among Bi-based cuprates. We observe CDW order with a single in-plane wavevector of qCDW = (0.25, 0), demonstrating that a coherent CDW order is formed across the trilayers. We also resolve CDW fluctuations emanating from the static order, whose profiles differ between the Cu L3 and O K edges. The phonon softening occurs where these CDW fluctuations interact with the phonon branch, indicating that the RIXS phonon anomaly is driven by the coupling between CDW fluctuations and the phonon branch.

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Cite

BibTeXRIS
BibTeX
@misc{nakata2026unique,
  title = {{Unique Charge-density-wave Order and Fluctuation-induced Phonon Softening in the Optimally-doped Trilayer Cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_10+δ$}},
  author = {S. Nakata and K. Yamamoto and J. Okamoto and D. Shiga and R. Takahashi and H. Y. Huang and H. Kumigashira and H. Wadati and A. Fujimori and S. Ishida and H. Eisaki and D. J. Huang and J. Miyawaki and H. Suzuki},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21305},
  eprint = {2610.21305},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21305},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Unique Charge-density-wave Order and Fluctuation-induced Phonon Softening in the Optimally-doped Trilayer Cuprate Bi_2Sr_2Ca_2Cu_3O_10+δ
AU  - S. Nakata
AU  - K. Yamamoto
AU  - J. Okamoto
AU  - D. Shiga
AU  - R. Takahashi
AU  - H. Y. Huang
AU  - H. Kumigashira
AU  - H. Wadati
AU  - A. Fujimori
AU  - S. Ishida
AU  - H. Eisaki
AU  - D. J. Huang
AU  - J. Miyawaki
AU  - H. Suzuki
PY  - 2026
DA  - 2026/10/15
PB  - arXiv
DO  - 10.48550/arxiv.2610.21305
UR  - https://arxiv.org/abs/2610.21305
AB  - Charge-density-wave (CDW) order is a ubiquitous feature of cuprate superconductors that competes with superconductivity. However, its behavior remains poorly understood in trilayer compounds, which contain the optimal number of CuO_2 layers for superconductivity. Here, we report Cu L_3- and O K-edge resonant inelastic x-ray scattering (RIXS) measurements of optimally-doped Bi_2Sr_2Ca_2Cu_3O_10+δ (Bi2223), the trilayer cuprate with the highest superconducting transition temperature (T_c) among Bi-based cuprates. We observe CDW order with a single in-plane wavevector of q_CDW = (0.25, 0), demonstrating that a coherent CDW order is formed across the trilayers. We also resolve CDW fluctuations emanating from the static order, whose profiles differ between the Cu L_3 and O K edges. The phonon softening occurs where these CDW fluctuations interact with the phonon branch, indicating that the RIXS phonon anomaly is driven by the coupling between CDW fluctuations and the phonon branch.
ER  -