Dichotomy in low- and high-energy band renormalizations in trilayer nickelate La4Ni3O10: a comparison with cuprates

Journal article : Letter

Band renormalizations comprise crucial insights for understanding the intricate roles of electron-boson coupling and electron correlation in emergent phenomena such as superconductivity. In this Letter, by combining high-resolution angle-resolved photoemission spectroscopy and theoretical calculations, we systematically investigate the electronic structure of the trilayer nickelate superconductor La₄Ni₃O₁₀ at ambient pressure. We reveal a dichotomy in the electronic band renormalizations of La₄Ni₃O₁₀ in comparison to cuprate superconductors. At a high energy scale of hundreds of meV, its band structure is strongly renormalized by an electron correlation effect enhanced by Hund's coupling. The resultant waterfall-like dispersions resemble the high-energy kinks in cuprate superconductors. However, at low-energy scales of tens of meV, the dispersive bands are nearly featureless and devoid of any resolvable electron-boson interactions, in drastic contrast to the low-energy kinks observed in cuprates and other correlated 3d transition-metal compounds. The dichotomic band renormalizations highlight the disparity between nickelate and cuprate superconductors and emphasize the importance of strong electron correlation in the superconductivity of Ruddlesden-Popper phase nickelates.

Authors: Du, X; Wang, YL; Li, YD; Cao, YT; Zhang, MX

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Physical Society
• Journal: Physical Review Letters
• Volume: 135
• Issue: 14
• Article number: 146506
• Place of publication: United States
• Publication date: 2025-10-01
• Acceptance date: 2025-09-10
• DOI: 10.1103/smkf-k7wq
• EISSN: 1079-7114
• ISSN: 0031-9007
• Pmid: 41110097
• Language: English
• Subtype: Letter