journal article·2023-01-11Open access

Formation of Head/Tail-to-Body Charged Domain Walls by Mechanical Stress

Qianwei Huang, Jiyuan Yang, Zibin Chen, Yujie Chen, Matthew J. Cabral, Haosu Luo, Fei Li, Shujun Zhang, Yulan Li, Zonghan Xie, Houbing Huang, Yiu-Wing Mai, Simon P. Ringer, Shi Liu, Xiaozhou Liao

Abstract

Domain walls (DWs) in ferroelectric materials are interfaces that separate domains with different polarizations. Charged domain walls (CDWs) and neutral domain walls are commonly classified depending on the charge state at the DWs. CDWs are particularly attractive as they are configurable elements, which can enhance field susceptibility and enable functionalities such as conductance control. However, it is difficult to achieve CDWs in practice. Here, we demonstrate that applying mechanical stress is a robust and reproducible approach to generate CDWs. By mechanical compression, CDWs with a head/tail-to-body configuration were introduced in ultrathin BaTiO3, which was revealed by in-situ transmission electron microscopy. Finite element analysis shows strong strain fluctuation in ultrathin BaTiO3 under compressive mechanical stress. Molecular dynamics simulations suggest that the strain fluctuation is a critical factor in forming CDWs. This study provides insight into ferroelectric DWs and opens a pathway to creating CDWs in ferroelectric materials.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Acoustic Wave Resonator Technologies · Multiferroics and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales2006, Australia

Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science, Westlake University, Hangzhou, Zhejiang310030, China

Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang310024, China

Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China

School of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia5005, Australia

Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai200050, China

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an710049, China

Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales2522, Australia

Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington99352, United States

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing100081, China

Funding

Westlake University · Australian Research Council · Hong Kong Polytechnic University

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