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Title: Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate S.

Deterministic control over the periodic geometrical arrangement of the constituent atoms is the backbone of the material properties, which, along with the interactions, define the electronic and magnetic ground state. Following this notion, a bilayer of a prototypical rare-earth nickelate, NdNiO3, combined with a dielectric spacer, LaAlO3, has been layered along the pseudocubic [111] direction. The resulting artificial graphenelike Mott crystal with magnetic 3d electrons has antiferromagnetic correlations. In addition, a combination of resonant X-ray linear dichroism measurements and 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.
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Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 116
American Physical Society (APS)
Research Org:
Argonne National Laboratory (ANL)
Sponsoring Org:
Chinese Academy of Sciences (CAS); USDOE Office of Science - Office of Basic Energy Sciences; U.S. Army Research Laboratory - U.S. Army Research Office (ARO); Gordon and Betty Moore Foundation
Country of Publication:
United States