Contrasting Momentum-Selective Spin-Density-Wave Gaps in Bilayer and Trilayer Nickelates

Name: Contrasting Momentum-Selective Spin-Density-Wave Gaps in Bilayer and Trilayer Nickelates
Uploaded: 2026-10-21T15:29:01.172898+00:00
Duration: 322 s
Description: Using electronic Raman scattering, this study mapped how a spin-density-wave (SDW) gap opens in trilayer La4Ni3O10, revealing a unique momentum-space pattern that differs from bilayer nickelates. The findings suggest the SDW instability connects the $\alpha$ and $\beta$ pockets near X/Y points rather than along the traditional nesting direction, constraining models of density-wave ordering.

Using electronic Raman scattering, this study mapped how a spin-density-wave (SDW) gap opens in trilayer La4Ni3O10, revealing a unique momentum-space pattern that differs from bilayer nickelates. The findings suggest the SDW instability connects the $\alpha$ and $\beta$ pockets near X/Y points rather than along the traditional nesting direction, constraining models of density-wave ordering.

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