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Multiorbital character of the density wave in trilayer nickelate superconductors

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arxiv 2508.06440 v2 pith:N7M7GNSZ submitted 2025-08-08 cond-mat.str-el cond-mat.supr-con

Multiorbital character of the density wave in trilayer nickelate superconductors

A. Suthar , V. Sundaramurthy , M. Bejas , Congcong Le , P. Puphal , P. Sosa-Lizama , A. Schulz , J. Nuss
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M. Isobe P. A. van Aken Y. E. Suyolcu M. Minola A. P. Schnyder Xianxin Wu B. Keimer G. Khaliullin A. Greco M. Hepting
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classification cond-mat.str-el cond-mat.supr-con
keywords densityramanmultiorbitalwavecalculationscharacterchargedelta
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Ruddlesden-Popper nickelates exhibit high-temperature superconductivity closely intertwined with charge and spin density waves. However, fundamental questions persist regarding the interplay between the associated density wave (DW) fluctuations and superconductivity, as well as the orbital character and symmetry underlying the DW instabilities. Here we utilize polarized Raman scattering to investigate the phononic and electronic Raman responses of the trilayer nickelate La$_4$Ni$_3$O$_{10}$ across its concomitant charge and spin density wave transitions. In addition to distinct phonon anomalies occurring below the transition temperature, we observe a depletion of continuum spectral weight up to 114 meV and a pronounced peak centered at this energy. By combining momentum-selective information from polarized electronic Raman scattering with Raman-response model calculations based on a multiorbital Raman vertex in a reconstructed two-orbital DW state involving both Ni-3$d_{x^2 - y^2}$ and Ni-3$d_{z^2}$ orbitals, we identify 114 meV as the energy scale $2\Delta_\mathrm{DW}$ of the DW gap, characterized by incoherent opening and non-mean-field behavior. Furthermore, the model calculations reveal that the corresponding $2\Delta_\mathrm{DW}$ peak has a multiorbital origin, requiring both orbital contributions and their mixing beyond single-orbital projections, thus shedding light on the nature of the DW instabilities in La$_4$Ni$_3$O$_{10}$.

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Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Imaging stripe dynamics in trilayer nickelate La$_4$Ni$_3$O$_{10}$

    cond-mat.str-el 2026-05 unverdicted novelty 8.0

    Spin-polarised STM reveals four-unit-cell stripe order in La4Ni3O10 with a near-complete 66 meV gap and discrete phase slips above 20 meV that allow imaging of stripe dynamics.

  2. Magnetic Order in bilayer Ruddlesden-Popper Nickelates

    cond-mat.supr-con 2026-07 conditional novelty 6.0

    Combining superexchange with RKKY interactions between orbital-selective local moments reproduces the (π/2,π/2) magnetic order and ~80 meV spin excitations of bilayer nickelate La₃Ni₂O₇.

  3. Pressure-Driven Structural Transitions without a Displacive Charge-Density Wave in La$_2$SmNi$_2$O$_7$

    cond-mat.str-el 2026-07 conditional novelty 6.0

    La2SmNi2O7 adopts a c-doubled monoclinic superstructure without a displacive CDW and transitions monoclinic→orthorhombic at 15 GPa then tetragonal at 21 GPa under pressure.

  4. Nonthermal melting and density wave instability coupled to the lattice in La$_4$Ni$_3$O$_{10}$

    cond-mat.str-el 2025-12 conditional novelty 6.0

    Ultrafast optical spectroscopy reveals a ~52 meV density-wave gap and mode-selective phonon anomalies in La4Ni3O10, and shows nonthermal melting of the density wave at high fluence.

  5. Tracing the horizon of tetragonal-to-monoclinic distortion in pressurized trilayer nickelate La4Ni3O10

    cond-mat.str-el 2025-12 conditional novelty 6.0

    La4Ni3O10 transforms directly from tetragonal to monoclinic under pressure, skipping the orthorhombic phase, and the transition temperature drops from 1030 K to 20 K by 14 GPa.

  6. Tracing the horizon of tetragonal-to-monoclinic distortion in pressurized trilayer nickelate La4Ni3O10

    cond-mat.str-el 2025-12 accept novelty 6.0

    Pressure drives a direct tetragonal-to-monoclinic transition in La4Ni3O10 that can be suppressed to 20 K at 14 GPa, with new observations of density-wave satellites in flux-grown crystals.

  7. Raman response in superconducting multiorbital systems with application to nickelates

    cond-mat.supr-con 2026-04 unverdicted novelty 5.0

    Raman response calculations for multiorbital nickelate models produce distinct spectral signatures for different superconducting pairing symmetries.

  8. Electronic layer decoupling driven by density-wave order in La$_4$Ni$_3$O$_{10}$

    cond-mat.str-el 2026-01 conditional novelty 5.0

    Density-wave order in La4Ni3O10 suppresses out-of-plane charge transport by over an order of magnitude, consistent with DW-driven dz2 redistribution that decouples the Ni-O trilayers.

  9. Identifying the structure of La3Ni2O7 in the pressurized superconducting state

    cond-mat.supr-con 2025-11 reject novelty 5.0

    The paper's abstract says the superconducting state has orthorhombic Fmmm structure; the full text says it is tetragonal I4/mmm, a direct contradiction that invalidates the headline claim.