biostudies-literatureUnknown15(1)Yang JThe 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 fNature communications4373https://www.ebi.ac.uk/biostudies/studies/S-EPMC11116484biostudies-literatureOrbital-dependent electron correlation in double-layer nickelate La₃Ni₂O₇.PMC11116484Zhang FMiao THu XMao HZhang SQu GWang MZhao LChen CQSun HWang ZYang JHuo MXie YYao DXZhou XJLuo HChen HYang FLiang BHuang YQian TPeng QZhu WXu ZLiu GfalseOrbital-dependent electron correlation in double-layer nickelate La₃Ni₂O₇.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 f2024-01-01T00:00:00Z2024 May2026-03-27T16:37:12.767Z2025-08-27T03:08:08.3ZS-EPMC111164843878290810.1038/s41467-024-48701-7