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Title: Interfacial charge-transfer Mott state in iridate–nickelate superlattices

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America

We investigate SrIrO3/LaNiO3 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 IrO6 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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Gordon and Betty Moore Foundation; US Department of the Navy, Office of Naval Research (ONR); USDOD; National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; SC0012375; GBMF4534; N000014-17-1-2770; DMR-1629346; DMR-1629059; N00014-16-1-2951
OSTI ID:
1574930
Alternate ID(s):
OSTI ID: 1637298
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, Issue 40; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (3)

Carrier localization in perovskite nickelates from oxygen vacancies journal October 2019
High-density electron doping of SmNiO 3 from first principles journal November 2019
Emergent electric field control of phase transformation in oxide superlattices text January 2020

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