Charge Transfer in Iridate-Manganite Superlattices.
basic_science · Level V
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- Record sourced from PubMed, PMID 28256840.
- Also identified by DOI 10.1021/acs.nanolett.6b04107.
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Abstract
Charge transfer in superlattices consisting of SrIrO<sub>3</sub> and SrMnO<sub>3</sub> is investigated using density functional theory. Despite the nearly identical work function and nonpolar interfaces between SrIrO<sub>3</sub> and SrMnO<sub>3</sub>, 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.