Epitaxial Antiperovskite/Perovskite Heterostructures for Materials Design

Authors

Camilo X. Quintela, University of Wisconsin-Madison
Kyung Song, Korean Institute of Materials Science
Ding-Fu Shao, University of Nebraska-LincolnFollow
Lin Xie, Nanjing University
Tianxiang Nan, University of Wisconsin-Madison
Tula R. Paudel, University of Nebraska-LincolnFollow
Neil Campbell, University of Wisconsin-Madison
Xiaoqing Pan, Nanjing University
Thomas Tybell, Norwegian University of Science and Technology
Mark S. Rzchowski, University of Wisconsin-Madison
Evgeny Y. Tsymbal, University of Nebraska-LincolnFollow
Si-Young Choi, Pohang University of Science and TechnologyFollow
Chang-Beom Eom, University of Wisconsin-MadisonFollow

ORCID IDs

Tsymbal http://orcid.org/0000-0002-6728-5480

Paudel https://orcid.org/0000-0002-9952-9435

Document Type

Article

Date of this Version

2020

Citation

Science Advances (2020) 6: eaba4017

doi: 10.1126/sciadv.aba4017

Supplemental materials are available at http://advances.sciencemag.org/content/suppl/2020/07/20/6.30.eaba4017.DC1

Comments

Copyright 2020, the authors. Open access

License: CC BY-NC 4.0

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 (La_0.3Sr_0.7)(Al_0.65Ta_0.35)O₃ 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.