| Autor: |
Christopher Addiego, Jacob A. Zorn, Wenpei Gao, Sujit Das, Jiaqi Guo, Chengqing Qu, Liming Zhao, Lane W. Martin, Ramamoorthy Ramesh, Long-Qing Chen, Xiaoqing Pan |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
APL Materials, Vol 11, Iss 5, Pp 051106-051106-8 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2166-532X |
| DOI: |
10.1063/5.0146713 |
| Popis: |
In ferroelectric heterostructures, the interaction between intrinsic polarization and the electric field generates a rich set of localized electrical properties. The local electric field is determined by several connected factors, including the charge distribution of individual unit cells, the interfacial electromechanical boundary conditions, and chemical composition of the interfaces. However, especially in ferroelectric perovskites, a complete description of the local electric field across micro-, nano-, and atomic-length scales is missing. Here, by applying four-dimensional scanning transmission electron microscopy (4D STEM) with multiple probe sizes matching the size of structural features, we directly image the electric field of polarization vortices in (PbTiO3)16/(SrTiO3)16 superlattices and reveal different electric field configurations corresponding to the atomic scale electronic ordering and the nanoscale boundary conditions. The separability of two different fields probed by 4D STEM offers the possibility to reveal how each contributes to the electronic properties of the film. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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