Resolve the microscopic origin of spin-density-wave order

Determine the microscopic origin of spin-density-wave order in bilayer nickelates by resolving the competing itinerant, strong-correlation, and other proposed mechanisms.

Background

The paper explains the suppression of spin-density-wave order through both an itinerant Fermi-surface-reconstruction picture and a strong-correlation picture involving delocalization of Ni dz2d_{z^2} orbitals. However, the authors emphasize that the underlying microscopic origin of the spin-density-wave state remains contested among several theoretical descriptions. The reported selective suppression of the spin-density-wave and charge-like anisotropy orders is presented as a constraint on, rather than a final resolution of, this issue.

References

While the microscopic origin of SDW order in bilayer nickelates remains under debate , this spectral-weight transfer can be interpreted from both itinerant and strong-correlation perspectives.

— Selective suppression of electronic orders via interlayer coupling in superconducting bilayer nickelate thin films  (2610.01757 - Han et al., 1 Oct 2026) in Section Results and discussion