Epitaxial antiperovskite/perovskite heterostructures for materials design
Open Access
- 1 July 2020
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 6 (30), eaba4017
- https://doi.org/10.1126/sciadv.aba4017
Abstract
Engineered heterostructures formed by complex oxide materials are a rich source of emergent phenomena and technological applications. In the quest for new functionality, a vastly unexplored avenue is interfacing oxide perovskites with materials having dissimilar crystallochemical properties. Here, we propose a unique class of heterointerfaces based on nitride antiperovskite and oxide perovskite materials as a previously unidentified direction for materials design. We demonstrate the fabrication of atomically sharp interfaces between nitride antiperovskite Mn3GaN and oxide perovskites (La0.3Sr0.7)(Al0.65Ta0.35)O-3 and SrTiO3. Using atomic-resolution imaging/spectroscopic techniques and first-principles calculations, we determine the atomic-scale structure, composition, and bonding at the interface. The epitaxial antiperovskite/perovskite heterointerface is mediated by a coherent interfacial monolayer that interpolates between the two antistructures. We anticipate our results to be an important step for the development of functional antiperovskite/perovskite heterostructures, combining their unique characteristics such as topological properties for ultralow-power applications.Funding Information
- National Science Foundation (DMR-1629270)
- National Science Foundation (DMR-1420645)
- U.S. Department of Energy (DE-FG02-06ER46327)
- Korea Institute of Materials Science (PNK6410)
- National Research Foundation of Korea (2013M3A6B1078872)
- National Research Foundation of Korea (NRF-2018R1A2B6008258)
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