Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7

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, Feng Yang, Zhimin Wang, Qinjun Peng, Hanqing Mao, Guodong Liu, Zuyan Xu, Tian Qian, Dao-Xin Yao (), Meng Wang (), Lin Zhao () and X. J. Zhou ()
Additional contact information
Jiangang Yang: Chinese Academy of Sciences
Hualei Sun: Sun Yat-Sen University
Xunwu Hu: Sun Yat-Sen University
Yuyang Xie: Chinese Academy of Sciences
Taimin Miao: Chinese Academy of Sciences
Hailan Luo: Chinese Academy of Sciences
Hao Chen: Chinese Academy of Sciences
Bo Liang: Chinese Academy of Sciences
Wenpei Zhu: Chinese Academy of Sciences
Gexing Qu: 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
Guodong Liu: Chinese Academy of Sciences
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
X. J. Zhou: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: 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.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-024-48701-7 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48701-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-48701-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().