Interfacial charge-transfer Mott state in iridate-nickelate superlattices.
interfacial charge transfer
iridates
nickelates
superlattice
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
01 Oct 2019
01 Oct 2019
Historique:
pubmed:
19
9
2019
medline:
19
9
2019
entrez:
19
9
2019
Statut:
ppublish
Résumé
We investigate [Formula: see text]/[Formula: see text] superlattices in which we observe a full electron transfer at the interface from Ir to Ni, triggering a massive structural and electronic reconstruction. Through experimental characterization and first-principles calculations, we determine that a large crystal field splitting from the distorted interfacial [Formula: see text] octahedra surprisingly dominates over the spin-orbit coupling and together with the Hund's coupling results in the high-spin (S = 1) configurations on both the Ir and Ni sites. This demonstrates the power of interfacial charge transfer in coupling lattice, charge, orbital, and spin degrees of freedom, opening fresh avenues of investigation of quantum states in oxide superlattices.
Identifiants
pubmed: 31527227
pii: 1907043116
doi: 10.1073/pnas.1907043116
pmc: PMC6778181
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
19863-19868Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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