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Magnetic properties and pseudogap formation in infinite-layer nickelates: insights from the single-band Hubbard model
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Magnetic properties and pseudogap formation in infinite-layer nickelates: insights from the single-band Hubbard model
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Paper
Magnetic properties and pseudogap formation in infinite-layer nickelates: insights from the single-band Hubbard model
2021
Overview
We study the magnetic and spectral properties of a single-band Hubbard model for the infinite-layer nickelate compound LaNiO\\(_2\\). As spatial correlations turn out to be the key ingredient for understanding its physics, we use two complementary extensions of the dynamical mean-field theory to take them into account: the cellular dynamical mean-field theory and the dynamical vertex approximation. Additionally to the systematic analysis of the doping dependence of the non-Curie-Weiss behavior of the uniform magnetic susceptibility, we provide insight into its relation to the formation of a pseudogap regime by the calculation of the one-particle spectral function and the magnetic correlation length. The latter is of the order of a few lattice spacings when the pseudogap opens, indicating a strong-coupling pseudogap formation in analogy to cuprates.
Publisher
Cornell University Library, arXiv.org
Subject
