Control of octahedral rotations via octahedral connectivity in an epitaxially strained [1 u.c.//4 u.c.] LaNiO3/LaGaO3 superlattice

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• 作者：H. Y. Qi ; M. K. Kinyanjui ; X. D. Chen ; J. Biskupek…
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：51
• 期：17
• 页码：8168-8176
• 全文大小：3,191 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803
• 卷排序：51

文摘

For ABO₃ perovskites, the magnetic and electronic properties couple strongly to the BO₆ octahedral rotations and distortions. Therefore, precise control of the octahedral rotations and distortions via epitaxial strain and interfacial octahedral connectivity has become the key for engineering novel functionalities in ABO₃ heterostructures and superlattices. In this paper, we investigated the local octahedral rotations in a [(1 unit cell (u.c.)//4 u.c.) × 13] LaNiO₃/LaGaO₃ superlattice grown on a (001) SrTiO₃ substrate. By using aberration-corrected high-resolution transmission electron microscopy, we found that the octahedral rotations of NiO₆ adopted the same [100] and [010] rotational magnitudes as the neighboring GaO₆ till the surface of the superlattice. Our results indicate that in LaNiO₃-based superlattices, the NiO₆ rotations can be precisely controlled via interfacial octahedral connectivity when the thickness of the LaNiO₃ layer is only 1 unit cell.Electronic supplementary materialThe online version of this article (doi:10.1007/s10853-016-0092-4) contains supplementary material, which is available to authorized users.