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  • Letter
  • Open Access

Pressure-invariant isotope effect as evidence for electronically driven intertwined order in Pr4Ni3O10

Rustem Khasanov1,*, Thomas J. Hicken1, Igor Plokhikh1,2, Ekaterina Pomjakushina1, Hubertus Luetkens1, Zurab Guguchia1, Christof W. Schneider1, and Dariusz J. Gawryluk1

  • 1PSI Center for Neutron and Muon Sciences CNM, 5232 Villigen PSI, Switzerland
  • 2Department of Physics, TU Dortmund University, 44227 Dortmund, Germany

  • *Contact author: rustem.khasanov@psi.ch
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Phys. Rev. B 114, L080508 – Published 24 August, 2026

DOI: https://doi.org/10.1103/wzcz-z62k

Abstract

We report muon-spin rotation measurements of the pressure dependence of the oxygen-isotope (O16/O18) effect on the spin-density wave (SDW) transition in the trilayer Ruddlesden-Popper nickelate Pr4Ni3O10. At ambient pressure, the SDW transition shows a finite isotope shift, with TSDW16=158.04(5)K and TSDW18=159.81(6)K. Under hydrostatic pressure, TSDW decreases linearly at rates that are equal within uncertainty for the two isotope compositions, d16TSDW/dp=−4.93(5) K/GPa and d18TSDW/dp=−4.90(7) K/GPa, such that the isotope shift remains constant within uncertainty under compression. The absence of pressure enhancement of the isotope effect points to a predominantly electronic origin of the SDW transition and is consistent with recent inelastic x-ray scattering results, suggesting a regime of intertwined order in trilayer RP nickelates, which is stabilized by strong spin interactions.

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Outline

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Phys. Rev. B 114, L080508– Published 24 August, 2026
  • Received 21 March 2026
  • Revised 10 July 2026
  • Accepted 22 July 2026
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