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Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7

Author

Listed:
  • Jiangang Yang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Hualei Sun

    (Sun Yat-Sen University)

  • Xunwu Hu

    (Sun Yat-Sen University)

  • Yuyang Xie

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Taimin Miao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Hailan Luo

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Hao Chen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Bo Liang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Wenpei Zhu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Gexing Qu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Cui-Qun Chen

    (Sun Yat-Sen University)

  • Mengwu Huo

    (Sun Yat-Sen University)

  • Yaobo Huang

    (Chinese Academy of Sciences)

  • Shenjin Zhang

    (Chinese Academy of Sciences)

  • Fengfeng Zhang

    (Chinese Academy of Sciences)

  • Feng Yang

    (Chinese Academy of Sciences)

  • Zhimin Wang

    (Chinese Academy of Sciences)

  • Qinjun Peng

    (Chinese Academy of Sciences)

  • Hanqing Mao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Guodong Liu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Zuyan Xu

    (Chinese Academy of Sciences)

  • Tian Qian

    (Chinese Academy of Sciences)

  • Dao-Xin Yao

    (Sun Yat-Sen University)

  • Meng Wang

    (Sun Yat-Sen University)

  • Lin Zhao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • X. J. Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

Abstract

The latest discovery of high temperature superconductivity near 80 K in La3Ni2O7 under high pressure has attracted much attention. Many proposals are put forth to understand the origin of superconductivity. The determination of electronic structures is a prerequisite to establish theories to understand superconductivity in nickelates but is still lacking. Here we report our direct measurement of the electronic structures of La3Ni2O7 by high-resolution angle-resolved photoemission spectroscopy. The Fermi surface and band structures of La3Ni2O7 are observed and compared with the band structure calculations. Strong electron correlations are revealed which are orbital- and momentum-dependent. A flat band is formed from the Ni-3d $${}_{{z}^{2}}$$ z 2 orbitals around the zone corner which is ~ 50 meV below the Fermi level and exhibits the strongest electron correlation. In many theoretical proposals, this band is expected to play the dominant role in generating superconductivity in La3Ni2O7. Our observations provide key experimental information to understand the electronic structure and origin of high temperature superconductivity in La3Ni2O7.

Suggested Citation

  • Jiangang Yang & Hualei Sun & Xunwu Hu & Yuyang Xie & Taimin Miao & Hailan Luo & Hao Chen & Bo Liang & Wenpei Zhu & Gexing Qu & Cui-Qun Chen & Mengwu Huo & Yaobo Huang & Shenjin Zhang & Fengfeng Zhang , 2024. "Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48701-7
    DOI: 10.1038/s41467-024-48701-7
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    References listed on IDEAS

    as
    1. Yang Zhang & Ling-Fang Lin & Adriana Moreo & Thomas A. Maier & Elbio Dagotto, 2024. "Structural phase transition, s±-wave pairing, and magnetic stripe order in bilayered superconductor La3Ni2O7 under pressure," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Haoxiang Li & Xiaoqing Zhou & Thomas Nummy & Junjie Zhang & Victor Pardo & Warren E. Pickett & J. F. Mitchell & D. S. Dessau, 2017. "Fermiology and electron dynamics of trilayer nickelate La4Ni3O10," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    3. B. Keimer & S. A. Kivelson & M. R. Norman & S. Uchida & J. Zaanen, 2015. "From quantum matter to high-temperature superconductivity in copper oxides," Nature, Nature, vol. 518(7538), pages 179-186, February.
    4. Hualei Sun & Mengwu Huo & Xunwu Hu & Jingyuan Li & Zengjia Liu & Yifeng Han & Lingyun Tang & Zhongquan Mao & Pengtao Yang & Bosen Wang & Jinguang Cheng & Dao-Xin Yao & Guang-Ming Zhang & Meng Wang, 2023. "Signatures of superconductivity near 80 K in a nickelate under high pressure," Nature, Nature, vol. 621(7979), pages 493-498, September.
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    Cited by:

    1. Xiaoyang Chen & Jaewon Choi & Zhicheng Jiang & Jiong Mei & Kun Jiang & Jie Li & Stefano Agrestini & Mirian Garcia-Fernandez & Hualei Sun & Xing Huang & Dawei Shen & Meng Wang & Jiangping Hu & Yi Lu & , 2024. "Electronic and magnetic excitations in La3Ni2O7," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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