Trilayer La4Ni3O10 shows spin excitations with comparable 60 meV bandwidth but substantially suppressed spectral weight relative to bilayer nickelates, indicating weaker electronic correlations and more three-dimensional multi-orbital character.
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Collective spin excitations in trilayer nickelate La$_4$Ni$_3$O$_{10}$
Trilayer La4Ni3O10 shows spin excitations with comparable 60 meV bandwidth but substantially suppressed spectral weight relative to bilayer nickelates, indicating weaker electronic correlations and more three-dimensional multi-orbital character.