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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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.
DFT-based tight-binding models and FRG calculations predict that reducing in-plane lattice constant or increasing out-of-plane constant in La3Ni2O7 films increases Fermi-level DOS and enhances Tc while preserving s± pairing.
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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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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Strain-Engineered Electronic Structure and Superconductivity in La$_3$Ni$_2$O$_7$ Thin Films
DFT-based tight-binding models and FRG calculations predict that reducing in-plane lattice constant or increasing out-of-plane constant in La3Ni2O7 films increases Fermi-level DOS and enhances Tc while preserving s± pairing.
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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.