Kavli Affiliate: Cheng Peng
| First 5 Authors: Fangze Liu, Cheng Peng, Edwin W. Huang, Brian Moritz, Chunjing Jia
| Summary:
We report a determinant quantum Monte Carlo study of a two-band model,
inspired by infinite-layer nickelates, focusing on the influence of interlayer
hybridization between $3d_{x^2-y^2}$ orbitals derived from Ni (or Ni and O) in
one layer and rare-earth ($R$) 5d orbitals in the other layer, hereafter the NI
and $R$ layers, respectively. For a filling with one electron shared between
the two layers on average, interlayer hybridization leads to "self-doped" holes
in the Ni layer and the absence of antiferromagnetic ordering, but rather the
appearance of spin-density and charge-density stripe-like states. As the
interlayer hybridization increases, both the Ni and $R$ layers develop
antiferromagnetic correlations, even though either layer individually remains
away from half-filling. For hybridization within an intermediate range, roughly
comparable to the intralayer nearest-neighbor hopping $t_{text{Ni}}$, the
model develops signatures of Kondo-like physics.
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