Dresden 2026 – scientific programme
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DS: Fachverband Dünne Schichten
DS 10: Focus Session: Nickelate Superconductivity: Insights into Unconventional Pairing and Correlation Effects I (joint session TT/DS/MA)
DS 10.7: Talk
Wednesday, March 11, 2026, 12:30–12:45, HSZ/0003
Multiorbital density wave in the trilayer nickelate La4Ni3O10 — Abhi Suthar1, Vignesh Sundaramurthy1, Matias Bejas2, Congcong Le3, Pascal Puphal1, Pablo Sosa-Lizama1, Masahiko Isobe1, Peter A. van Aken1, Y. Eren Suyolcu1, Matteo Minola1, Andreas P. Schnyder1, Xianxin Wu4, Bernhard Keimer1, Giniyat Khaliullin1, Andres Greco2, and •Matthias Hepting1 — 1Max-Planck-Institute for Solid State Research, Stuttgart, Germany — 2UNR-CONICET, Rosario, Argentina — 3RIKEN, Saitama, Japan — 4Institute of Theoretical Physics, Beijing, China
Ruddlesden–Popper nickelates exhibit high-temperature superconductivity closely intertwined with charge and spin density wave order. However, fundamental questions persist regarding the orbital character and symmetry underlying the density wave instabilities. Using polarized Raman scattering on trilayer La4Ni3O10, we resolve characteristic phonon anomalies and a redistribution of electronic spectral weight across the density wave transitions. Momentum-selective electronic Raman responses, combined with multiorbital model calculations, reveal a density-wave–induced gap with incoherent, non-mean-field opening and contributions from both Ni-dx2−y2 and dz2 states [1]. These results reconcile conflicting experimental reports of the density wave gap and underscore its multiorbital character.
[1] A. Suthar et al., arXiv:2508.06440 (2025).
Keywords: Charge density wave; Spin density wave; Superconductivity; Raman spectroscopy