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Superconducting phase diagram of finite-layer nickelates Nd n+1Ni n O2n+2
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Authors: Andreas Hausoel, Simone Di Cataldo, Motoharu Kitatani, Oleg Janson, Karsten Held
Year
2025
Paper ID
30325
Status
Peer-reviewed
Abstract Read
~2 min
Abstract Words
129
Citations
N/A
Abstract
Abstract Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting T c vs. the number of layers n for finite-layer nickelates using the dynamical vertex approximation. To this end, we start with density functional theory, and include local correlations non-perturbatively by dynamical mean-field theory for n = 2–7. For all n, the Ni ${d}_{{x}2-{y}2}d x 2 − y 2 orbital crosses the Fermi level, but for n > 4 there are additional (π, π) pockets or tubes that slightly enhance the layer-averaged hole doping of the{d}_{{x}2-{y}2}d x 2 − y 2 orbitals beyond the leading 1/n contribution stemming from the valence electron count. We finally calculate T c for the single-orbital{d}_{{x}2-{y}2}$ d x 2 − y 2 Hubbard model by dynamical vertex approximation.
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- Abstract Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting T c vs.
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