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 10.6: Talk
Wednesday, March 11, 2026, 12:15–12:30, HSZ/0003
Investigation of Ruddlesden-Popper nickelates and the monolayer-trilayer polymorph using Raman spectroscopy — •Vignesh Sundaramurthy1, Abhi Suthar1, Pascal Puphal1,2, Hasan Yilmaz3, Masahiko Isobe1, Matteo Minola1, Bernhard Keimer1, and Matthias Hepting1 — 1Max-Planck-Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany — 22nd Physics Institute, University of Stuttgart, 70569 Stuttgart, Germany — 3University of Stuttgart, Institute for Materials Science, Materials Synthesis Group, Heisenbergstraße 3, 70569 Stuttgart, Germany
Ruddlesden-Popper nickelates have attracted intense interest following the discovery of superconductivity in several members of the series, including bilayer La3Ni2O7, trilayer La4Ni3O10, and structural polymorphs composed of monolayer-bilayer or monolayer-trilayer (ML-TL) units. In this talk, we explore the phononic and electronic Raman responses of high-quality ML-TL single crystals and contrast them with those of the other nickelate phases, using samples with optimized oxygen content.
Keywords: Ruddlsden-Popper nickelates; Polymorphs; Raman Spectroscopy