REVIEW 11 cited by
Unraveling Spin Density Wave Order in Layered Nickelates La₃Ni₂O₇ and La₂PrNi₂O₇ via Neutron Diffraction
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Unraveling Spin Density Wave Order in Layered Nickelates La₃Ni₂O₇ and La₂PrNi₂O₇ via Neutron Diffraction
read the original abstract
The discovery of pressure-induced superconductivity in two- and three-layer Ruddlesden-Popper nickelates has generated significant interest in these materials as a platform for unconventional superconductivity. While their ground state exhibits magnetism, a direct determination of their magnetic structure remains elusive. Understanding this aspect is crucial, as magnetism may play a role in the pairing mechanism of superconductivity in these compounds. We resolve the magnetic structures of the bilayer (2222) polymorphs of La3Ni2O7 and La2PrNi2O7 using neutron powder diffraction (NPD) and muon-spin rotation/relaxation (muSR). Magnetic neutron scattering appears below approximately 150 K in both compounds and is observed at the (qx, 1/2, 0) position, with qx = 0 and 1/2 for La3Ni2O7 and qx = 0 for La2PrNi2O7. Within a single layer, alternating low (0.05 - 0.075 muB) and high (0.66 muB) magnetic moment stripes form. These layers stack antiferromagnetically along the c-direction to form bilayers. The presence of two propagation vectors (qx = 0 and 1/2) in undoped La3Ni2O7 suggests the coexistence of two magnetic stacking polymorphs within a single crystallographic phase. The muSR spectra further confirm these magnetic structures. Our findings provide a detailed understanding of the magnetic ground state in bilayer nickelates, offering insights into possible precursor states that may influence the emergence of superconductivity in these materials.
Forward citations
Cited by 11 Pith papers
-
High-energy electronic excitations in La3Ni2O7 by time-resolved optical spectroscopy
Time-resolved optical spectroscopy on La3Ni2O7 reveals two high-energy excitations with density-wave gaps of 54 meV and 67 meV, relaxation via the Rothwarf-Taylor model, and four coherent phonons with distinct electro...
-
Doping evolution of spin excitations in La$_{3-x}$Sr$_{x}$Ni$_2$O$_7$/SrLaAlO$_4$ superconducting thin films
Spin excitations persist with nearly unchanged exchange energy through the superconducting dome of Sr-doped La3Ni2O7 films, then collapse into a damped continuum when superconductivity is lost at x=0.38.
-
Density-wave phases, anisotropic transport, and Planckian dissipation in single crystals of the superconductor La3Ni2O7
In clean La3Ni2O7 single crystals, pressure suppresses two density-wave orders and yields zero-resistance superconductivity from a Planckian T-linear strange metal.
-
Magnetic Order in bilayer Ruddlesden-Popper Nickelates
Combining superexchange with RKKY interactions between orbital-selective local moments reproduces the (π/2,π/2) magnetic order and ~80 meV spin excitations of bilayer nickelate La₃Ni₂O₇.
-
Hall Coefficient Sign Reversal Driven by Orbital-Selective Oxygen-Vacancy Scattering in Nickelate Films
In-plane oxygen vacancies selectively suppress d_x2-y2 pocket transport and reverse the Hall coefficient in bilayer nickelate films; rigid-band doping alone cannot.
-
Density waves in low-pressure bilayer nickelates
Unrestricted Hartree-Fock calculations show the second density-wave transition in La3Ni2O7 originates from double-stripe spin order becoming unstable toward a commensurate charge-density wave, yielding intertwined spi...
-
Nature of magnetism in bilayer nickelate La3Ni2O7 single crystals
Single-crystal neutron scattering establishes stripe antiferromagnetic order with strong interlayer coupling and competing in-plane exchanges in La3Ni2O7, yielding fluctuating moments comparable to cuprates but with l...
-
Electronic Nematicity Revealed by Polarized Ultrafast Spectroscopy in Bilayer La$_3$Ni$_2$O$_7$
Bilayer nickelate La3Ni2O7 shows spontaneous two-fold electronic anisotropy (nematicity) below the spin-density-wave transition, whereas trilayer La4Ni3O10 remains isotropic.
-
Magnetic configurations and excitations in high-$T_{c}$ multilayer nickelates
Multi-orbital Hartree-Fock calculations identify single-stripe magnetic order in bilayers and mirror-odd SDW in trilayers as consistent with experimental magnetic excitations in multilayer nickelates.
-
Superconductivity in Ruddlesden-Popper nickelates: a review of recent progress, focusing on thin films
The review covers experimental and theoretical progress on superconductivity in Ruddlesden-Popper nickelates, emphasizing ambient-pressure thin-film results in La3Ni2O7.
-
Recent progress in nickelate superconductors
A comprehensive review of nickelate superconductors that surveys the 112, 327, and 43(10) families and frames the key open questions about their pairing mechanisms.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.