Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate

Abstract

Deterministic control over the periodic geometrical arrangement of the constituent atoms is the backbone of the material properties, that along with the interactions define the electronic and magnetic ground state. Following this notion, a bilayer of a prototypical rare-earth nickelate, NdNiO${}_3$, combined with a dielectric spacer, LaAlO${}_3$, has been layered along the pseudo cubic [111] direction. The resulting artificial graphene-like Mott crystal with magnetic 3$d$ electrons has antiferromagnetic correlations. In addition, a combination of resonant X-ray linear dichroism measurements and \textit{ab-initio} calculations reveal the presence of an ordered orbital pattern, which is unattainable in either bulk nickelates or nickelate based heterostructures grown along the [001] direction. These findings highlight another promising venue towards designing new quantum many-body states by virtue of geometrical engineering.

arXiv commentText, Figures have been modified

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Cited by in corpus (28)

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• Complex magnetic order in nickelate slabs
• Perspective: Strongly correlated and topological states in [111] grown transition metal oxide thin films and heterostructures
• Design of Mott and topological phases on buckled 3d-oxide honeycomb lattices
• Disentangled cooperative orderings in artificial rare-earth nickelates
• Selective Interface Control of Order Parameters in Complex Oxides
• Spatial Goos-Hänchen shift in photonic graphene
• Transition-Metal Oxide (111) bilayers
• Anomalous electron transport in epitaxial NdNiO${}_3$ films
• Geometrical lattice engineering of complex oxide heterostructures: a designer approach to emergent quantum states
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• Reconstruction-Stabilized Epitaxy of LaCoO3/SrTiO3(111) Heterostructures by Pulsed Laser Deposition
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• Interaction-driven Quantum Anomalous Hall Effect in Halogenated Hematite Nanosheets
• Electronic structure of buried LaNiO3 layers in (111)-oriented LaNiO3/LaMnO3 superlattices probed by soft x-ray ARPES
• Electronic structure of a graphene-like artificial crystal of $NdNi{O}_3$
• Engineering charge ordering into multiferroicity
• Magnetism and berry phase manipulation in an emergent structure of perovskite ruthenate by (111) strain engineering
• Finite-temperature phase diagram of (111) nickelate bilayers
• Interplay between electron correlations, magnetic state, and structural confinement in LaNiO3 ultrathin films
• Giant orbital polarization of Ni${}^{2+}$ in square planar environment
• Electronic band structure of (111) $SrRu{O}_3$ thin film$-$an angle-resolved photoemission spectroscopy study
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• Interfacial reconstruction effects in insulating double perovskite Nd${}_2$NiMnO${}_6$/SrTiO${}_3$ and Nd${}_2$NiMnO${}_6$/NdGaO${}_3$ thin films
• Quantum spin liquids by geometric lattice design
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