Antiferromagnetic metal phase in an electron-doped rare-earth nickelate

Abstract

Long viewed as passive elements, antiferromagnetic materials have emerged as promising candidates for spintronic devices due to their insensitivity to external fields and potential for high-speed switching. Recent work exploiting spin and orbital effects has identified ways to electrically control and probe the spins in metallic antiferromagnets, especially in noncollinear or noncentrosymmetric spin structures. The rare earth nickelate NdNiO3 is known to be a noncollinear antiferromagnet where the onset of antiferromagnetic ordering is concomitant with a transition to an insulating state. Here, we find that for low electron doping, the magnetic order on the nickel site is preserved while electronically a new metallic phase is induced. We show that this metallic phase has a Fermi surface that is mostly gapped by an electronic reconstruction driven by the bond disproportionation. Furthermore, we demonstrate the ability to write to and read from the spin structure via a large zero-field planar Hall effect. Our results expand the already rich phase diagram of the rare-earth nickelates and may enable spintronics applications in this family of correlated oxides.

arXiv comment25 pages, 4 figures

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• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
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Cited by in corpus (9)

• Synthesis of thin film infinite-layer nickelates by atomic hydrogen reduction: clarifying the role of the capping layer
• Phase formation in hole- and electron-doped rare-earth nickelate single crystals
• Terahertz-driven ultrafast dynamics of rare-earth nickelates by controlling only the charge degree of freedom
• Anomalous enhancement of magnetism by nonmagnetic doping in the honeycomb-lattice antiferromagnet ErOCl
• Signatures of polarized chiral spin disproportionation in rare earth nickelates
• Superconducting phase diagram of multi-layer square-planar nickelates
• Unveiling the critical role of interfacial strain in adjusting electronic phase transitions in correlated vanadium dioxide
• Charge disproportionation as a possible mechanism towards polar antiferromagnetic metal in molecular orbital crystal
• Layer controlled orbital selective Mott transition in monolayer nickelate