Separating the Density Wave Phase from Zero-Resistance Superconductivity in La$_4$Ni$_3$O$_{10}$

P. Puphal; A. Suthar; B. Wehinger; V. Sundaramurthy; T. Priessnitz; M. Knauft; P. Sosa-Lizama; Y. -M. Wu; M. Hepting; J. Nuss; M. Isobe; P. A. van Aken; Y. E. Suyolcu; B. Keimer; H. Takagi; P. Reiss

arXiv · 2610.38959

Separating the Density Wave Phase from Zero-Resistance Superconductivity in La$_4$Ni$_3$O$_{10}$

P. Puphal·A. Suthar·B. Wehinger·V. Sundaramurthy·T. Priessnitz·M. Knauft·P. Sosa-Lizama·Y. -M. Wu·M. Hepting·J. Nuss·M. Isobe·P. A. van Aken·Y. E. Suyolcu·B. Keimer·H. Takagi·P. Reiss

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Abstract

Identifying the key ingredients for superconductivity under pressure in the Ruddlesden-Popper nickelates remains a formidable challenge, due to a complex interplay between structural variations, oxygen content and location, electronically ordered phases, and the need for high pressures to reach the superconducting phase. To disentangle these complex inter-dependencies, here we study a series of clean single crystals of trilayer La$_4$Ni$_3$O$_{10}$. We discover that enhanced biaxial, compressive pressures induce a zero-resistance state at a 60\% lower pressure compared to previous reports. At the same time, we completely separate the low-pressure density wave phase from superconductivity, effectively ruling out that soft, quantum critical fluctuations of the density wave order parameter act as the pairing glue in this system. Our results establish biaxial, in-plane pressures as a powerful tool for promoting superconductivity in nickelates, unifying the required pressure scales for superconductivity in different Ruddlesden-Popper structures, and providing a connection to the recently discovered thin film samples.

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P. Puphal, A. Suthar, B. Wehinger, V. Sundaramurthy, T. Priessnitz, M. Knauft, P. Sosa-Lizama, Y. -M. Wu, M. Hepting, J. Nuss, M. Isobe, P. A. van Aken, Y. E. Suyolcu, B. Keimer, H. Takagi, P. Reiss. 2026-10-28. Separating the Density Wave Phase from Zero-Resistance Superconductivity in La$_4$Ni$_3$O$_{10}$. https://arxiv.org/abs/2610.38959

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