Electrical polarization induced by atomically engineered compositional gradient in complex oxide solid solution

Ping Chun Wu, Rong Huang, Ying Hui Hsieh, Bo Wang, Min Yen, Sheng Zhu Ho, Akihito Kumamoto, Chaorong Zhong, Haili Song, Yi Chun Chen, Long Qing Chen, Chun Gang Duan, Yuichi Ikuhara, Ying Hao Chu

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

Control of inhomogeneity in materials in order to avoid unexpected effects to the system remains a challenge. In this study, we seek to engineer inhomogeneity in materials and anticipate new properties. Through precise control of composition at the atomic scale, an electrical polarization is induced in the composition-graded LaAlO3–SrTiO3 solid solution epitaxially deposited on NdGaO3 substrates. By tailoring the direction of compositional gradient, the relationship between structure and electrical polarization is simulated via phase-field modeling and revealed by a combination of scanning transmission electron microscopy and scanning probe microscopy. The analysis of the results indicates that the induced polarization is due to the flexoelectric effect in the compositional gradient system. The results of this study provide a new pathway for obtaining a new material genome. Moreover, by a suitable design of the new genome, that is, by using different combinations of compositional gradient geometries, local conduction can be obtained and manipulated, providing a new approach to obtain the desired properties.

原文English
文章編號17
期刊NPG Asia Materials
11
發行號1
DOIs
出版狀態Published - 2019 12月 1

All Science Journal Classification (ASJC) codes

  • 建模與模擬
  • 一般材料科學
  • 凝聚態物理學

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