Ligand holes on planar and apical oxygen hybridize selectively with Ni d_x2-y2 and d_z2 orbitals in La4Ni3O10, enabling RIXS to show d_x2-y2 dominance in low-energy excitations and a ~50 meV interlayer superexchange from observed bimagnons.
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First-principles calculation shows selective excitation of an IR phonon mode in La3Ni2O7 produces a small nonlinear shift that moves the Ni-O-Ni bond angle closer to 180 degrees.
Hole-doped spin multimer systems mapped to hardcore boson model exhibit superconductivity signatures; DMRG on double Kondo lattice shows pairing persists via crossover and pair correlations become independent of local spin details once binding energy is sufficient.
A d_x2-y2 orbital bilayer t-J model with first-principles parameters unifies experimental Tc controls in La3Ni2O7 via particle-hole asymmetry and J_perp dependence, proposing electron doping to enhance Tc.
Constrained-path QMC simulations of a bilayer Hubbard model map a crossover from d-wave to s±-wave pairing driven by Hund's coupling and crystal field splitting in La3Ni2O7.
DMRG calculations on three-leg t-J ladders show power-law decaying pair correlations upon hole doping into the 1/3-filled spin-gapped state, with exponentially decaying spin correlations.
La5Ni3O11 shows layer-selective physics with the single layer near a Mott instability and the bilayer dominating low-energy states, yielding an electronic structure that closely resembles the bilayer La3Ni2O7.
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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Distinct orbital contributions to electronic and magnetic structures in La$_{4}$Ni$_{3}$O$_{10}$
Ligand holes on planar and apical oxygen hybridize selectively with Ni d_x2-y2 and d_z2 orbitals in La4Ni3O10, enabling RIXS to show d_x2-y2 dominance in low-energy excitations and a ~50 meV interlayer superexchange from observed bimagnons.
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Optical control of the crystal structure in the bilayer nickelate superconductor La3Ni2O7 via nonlinear phononics
First-principles calculation shows selective excitation of an IR phonon mode in La3Ni2O7 produces a small nonlinear shift that moves the Ni-O-Ni bond angle closer to 180 degrees.
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Superconductivity in doped spin multimer systems
Hole-doped spin multimer systems mapped to hardcore boson model exhibit superconductivity signatures; DMRG on double Kondo lattice shows pairing persists via crossover and pair correlations become independent of local spin details once binding energy is sufficient.
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A Unified Understanding of the Experimental Controlling of the T$_\text{c}$ of La$_3$Ni$_2$O$_7$
A d_x2-y2 orbital bilayer t-J model with first-principles parameters unifies experimental Tc controls in La3Ni2O7 via particle-hole asymmetry and J_perp dependence, proposing electron doping to enhance Tc.
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Pairing Symmetry Crossover from $d$-wave to $s_{\pm}$-wave in a Bilayer Nickelate Driven by Hund's Coupling and Crystal Field Splitting
Constrained-path QMC simulations of a bilayer Hubbard model map a crossover from d-wave to s±-wave pairing driven by Hund's coupling and crystal field splitting in La3Ni2O7.
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Pairing properties of correlated three-leg ladders with strong interchain couplings near 1/3 filling
DMRG calculations on three-leg t-J ladders show power-law decaying pair correlations upon hole doping into the 1/3-filled spin-gapped state, with exponentially decaying spin correlations.
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Correlated electronic structure of the alternating monolayer-bilayer nickelate La$_{5}$Ni$_{3}$O$_{11}$
La5Ni3O11 shows layer-selective physics with the single layer near a Mott instability and the bilayer dominating low-energy states, yielding an electronic structure that closely resembles the bilayer La3Ni2O7.
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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.