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Anisotropic electronic correlations in the spin density wave state of La3Ni2O7

  • Ge He*
  • , Jun Shen*
  • , Shiyu Xie
  • , Haotian Zhang
  • , Mengwu Huo
  • , Jun Shu
  • , Deyuan Hu
  • , Xiaoxiang Zhou
  • , Yanmin Zhang
  • , Lei Qin
  • , Liangxin Qiao
  • , Hengjie Liu
  • , Chuansheng Hu
  • , Xijie Dong
  • , Dengjing Wang
  • , Jun Liu
  • , Wei Hu
  • , Jie Yuan
  • , Yajun Yan
  • , Zeming Qi
  • Kui Jin, Zengyi Du*, Meng Wang, Dong Lai Feng*
*此作品的通讯作者
  • Beijing Institute of Technology
  • University of Science and Technology of China
  • Sun Yat-Sen University
  • Wuhan University of Science and Technology
  • Hefei National Laboratory
  • Beijing Information Science & Technology University
  • CAS - Institute of Physics
  • University of Chinese Academy of Sciences
  • Songshan Lake Materials Laboratory

科研成果: 期刊稿件文章同行评审

摘要

The bilayer nickelate superconductor La3Ni2O7undergoes a density wave transition near 150 K that has attracted intensive scrutiny, yet its microscopic origin remains elusive. Here we report polarization-resolved electronic Raman scattering measurements on high-quality single crystals of La3Ni2O7. Below 150 K, we observe a pronounced, symmetry-dependent redistribution of spectral weight in B1gand B2gchannels, consistent with the formation of spin-density-wave (SDW) gaps. Quantitative analysis reveals momentum-selective SDW gap amplitudes, with intermediate-to-strong coupling near X/Y points of the Brillouin zone and weaker coupling along the diagonal direction, indicating an unconventional SDW driven by anisotropic electronic correlations. Our results establish the electronic character of the SDW in La3Ni2O7, and provide a microscopic foundation for understanding the emergence of high-temperature superconductivity under pressure in nickelates.

源语言英语
期刊论文编号6272
期刊Nature Communications
17
1
DOI
出版状态已出版 - 12月 2026

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