| Literature DB >> 31527227 |
Xiaoran Liu1, Michele Kotiuga2, Heung-Sik Kim2, Alpha T N'Diaye3, Yongseong Choi4, Qinghua Zhang5, Yanwei Cao6, Mikhail Kareev2, Fangdi Wen2, Banabir Pal2, John W Freeland4, Lin Gu5, Daniel Haskel4, Padraic Shafer3, Elke Arenholz3, Kristjan Haule2, David Vanderbilt2, Karin M Rabe1, Jak Chakhalian2.
Abstract
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.Entities:
Keywords: interfacial charge transfer; iridates; nickelates; superlattice
Year: 2019 PMID： 31527227 PMCID： PMC6778181 DOI： 10.1073/pnas.1907043116
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205