Strain engineering of epitaxial oxide heterostructures beyond substrate limitations

Xiong Deng, Chao Chen, Deyang Chen, Xiangbin Cai, Xiaozhe Yin, Chao Xu, Fei Sun, Caiwen Li, Yan Li, Han Xu, Mao Ye, Guo Tian, Zhen Fan, Zhipeng Hou, Minghui Qin, Yu Chen, Zhenlin Luo, Xubing Lu, Guofu Zhou, Lang ChenNing Wang, Ye Zhu, Xingsen Gao, Jun Ming Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Epitaxial strain, imparted by an underlying substrate, is a powerful pathway to drive phase transitions and alter properties in complex oxides, enabling the creation of new ground states and novel functionalities. To realize these emergent phenomena, the availability of appropriate single-crystal substrates for the growth of high-quality epitaxial oxide films with a desired strain state cannot be overemphasized. However, the limitation of commercial substrates and the lack of continuous strain tunability result in stringent restrictions on the further discovery of novel properties and fundamental physics. Here, we propose a strategy for imposing continuously tunable strain beyond substrate limitations by inserting an interface layer, enabling the achievement of continuous orthorhombic–rhombohedral-like–tetragonal-like phase transition in BiFeO3 films on a single substrate and the integration of morphotropic phase boundary on different substrates. This work provides a framework for the strain engineering of complex oxides.

Original languageEnglish
Pages (from-to)1323-1334
Number of pages12
JournalMatter
Volume4
Issue number4
DOIs
Publication statusPublished - 7 Apr 2021

Keywords

  • BiFeO
  • complex oxides
  • continuous strain tuning
  • epitaxial strain
  • interface
  • MAP2: Benchmark
  • morphotropic phase boundary
  • phase transition

ASJC Scopus subject areas

  • Materials Science(all)

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