A mirror-selective itinerant SDW model unifies magnetic order and excitations in Ruddlesden-Popper nickelates as fundamentally itinerant rather than local-moment.
Chen , author Z
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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.
Superconductivity in La3Ni2O7 arises from interlayer Cooper pairs of 3d_x2-y2 electrons driven by effective J_perp from Hund-assisted AFM exchange transfer, while localized 3d_z2 electrons form rung singlets that produce a pseudogap but no condensate.
citing papers explorer
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Itinerant Nature of Spin-Density-Wave Order in Ruddlesden-Popper Nickelates
A mirror-selective itinerant SDW model unifies magnetic order and excitations in Ruddlesden-Popper nickelates as fundamentally itinerant rather than local-moment.
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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.
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Superconductivity in bilayer La$_3$Ni$_2$O$_7$: A review focusing on the strong-coupling Hund's rule assisted pairing mechanism
Superconductivity in La3Ni2O7 arises from interlayer Cooper pairs of 3d_x2-y2 electrons driven by effective J_perp from Hund-assisted AFM exchange transfer, while localized 3d_z2 electrons form rung singlets that produce a pseudogap but no condensate.