Charge Transfer in Iridate-Manganite Superlattices

Charge transfer in superlattices consisting of SrIrO3 and SrMnO3 is investigated using density functional theory. Despite the nearly identical work function and nonpolar interfaces between SrIrO3 and SrMnO3, rather large charge transfer was experimentally reported at the interface between them. Here...

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Bibliographic Details
Published in:Nano letters 2017-04, Vol.17 (4), p.2126-2130
Main Authors: Okamoto, Satoshi, Nichols, John, Sohn, Changhee, Kim, So Yeun, Noh, Tae Won, Lee, Ho Nyung
Format: Article
Language:English
Subjects:
density functional theory
electronic reconstruction
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
modeling
oxide heterostructures
x-ray and optical measurements
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Summary:Charge transfer in superlattices consisting of SrIrO3 and SrMnO3 is investigated using density functional theory. Despite the nearly identical work function and nonpolar interfaces between SrIrO3 and SrMnO3, rather large charge transfer was experimentally reported at the interface between them. Here, we report a microscopic model that captures the mechanism behind this phenomenon, providing a qualitative understanding of the experimental observation. This leads to unique strain dependence of such charge transfer in iridate-manganite superlattices. The predicted behavior is consistently verified by experiment with soft X-ray and optical spectroscopy. Our work thus demonstrates a new route to control electronic states in nonpolar oxide heterostructures.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.6b04107