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Existence of long-range antiferromagnetism in undoped infinite-layer nickelates

Ascertain whether undoped infinite-layer nickelates exhibit long-range antiferromagnetic order, in contrast to the robust antiferromagnetic insulating parent compounds of cuprate superconductors.

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Background

While cuprate parent compounds are well-established antiferromagnetic insulators, undoped infinite-layer nickelates display bad-metal behavior. Whether they host long-range antiferromagnetic order is a key unresolved aspect of their normal-state physics.

Clarifying the magnetic ground state of undoped nickelates is important for interpreting their superconductivity and for assessing analogies and differences with cuprates.

References

For example, unlike the cuprates’ parent compound, which is a robust antiferromagnetic insulator, undoped IL nickelates show bad-metal behavior and the possible existence of long-range antiferromagnetism is still under debate [6,11–13].

— Purely two-dimensional vortex matter in infinite-layer nickelates (2410.14341 - Sanchez-Manzano et al., 18 Oct 2024) in Introduction, paragraph 1 (Page 1)