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Single-stripe magnetic order and bilayer spin dynamics in single-crystalline La(3)Ni(2)O(7).
Nature materials · · Journal Article · Open access
Chen, Zhang + more
Abstract ↗AI summary
The abstract is read at the publisher; the summary is JClub's.
Single-crystalline La3Ni2O7 shows single-stripe magnetic order with a finite spin gap, anisotropic in-plane excitations, and bilayer modulation indicating antiferromagnetic interlayer coupling.
- Why it matters: Ambient-pressure nickelate magnetism is poorly characterized, limiting understanding of how electronic correlations might support pairing in superconducting phases.
- What they did: Using neutron spectroscopy on single crystals, the team mapped spin order and excitations and fit the dispersion with a bilayer Heisenberg-type model featuring strong interlayer exchange and competing in-plane couplings.
- The result: The spin-wave bandwidth is about 25% of that in cuprates, yet the local dynamic susceptibility at comparable energies is enhanced, giving a comparable total fluctuating moment.
The findingWhy it mattersWhat they didThe result
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