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<p>Ferroelectric topological vortex domains have attracted interest for their topologically protected properties and potential in next-generation electronics. Although extensive research has focused on low-dimensional nanostructures, the role of vortex domains in bulk ferroelectrics remains poorly understood. Here we identify topological vortex structures in bulk Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbTiO<sub>3</sub> crystals and demonstrate their direct role in enhancing the piezoelectric response, establishing a mechanistic link between vortex structures and macroscopic performance. We develop a straightforward and scalable method, mechanically assisted electrical poling, to engineer vortex domain density, which increases the vortex core density from 0.01 μm<sup>−</sup><sup>2</sup> in conventionally poled samples to 21 μm<sup>−</sup><sup>2</sup>. This controlled domain engineering leads to a remarkable improvement in the piezoelectric response, primarily attributed to localized strain surrounding the vortex cores. This study advances our understanding of topological structures in bulk ferroelectrics, and opens up a practical pathway to engineer high-performance ferroelectrics for device applications.</p>

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Topological piezoelectricity in bulk ferroelectrics

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Zheng Wu,
  • Yating Ran,
  • Yuanbo Li,
  • Danyang Wang,
  • Xiaobing Li,
  • Feifei Wang,
  • Anyang Cui,
  • Xiaoming Shi,
  • Yifan Chen,
  • Feilong Yan,
  • Zhongchen Gao,
  • Zhihua Duan,
  • Liman Sai,
  • Xiaomei Qin,
  • Tao Wang,
  • Yanxue Tang,
  • Xiangyong Zhao,
  • Qiaozhen Zhang,
  • Jie Jiao,
  • Haosu Luo,
  • Yiu-Wing Mai,
  • Fei Li,
  • Zibin Chen,
  • Houbing Huang,
  • Shujun Zhang

摘要

Ferroelectric topological vortex domains have attracted interest for their topologically protected properties and potential in next-generation electronics. Although extensive research has focused on low-dimensional nanostructures, the role of vortex domains in bulk ferroelectrics remains poorly understood. Here we identify topological vortex structures in bulk Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals and demonstrate their direct role in enhancing the piezoelectric response, establishing a mechanistic link between vortex structures and macroscopic performance. We develop a straightforward and scalable method, mechanically assisted electrical poling, to engineer vortex domain density, which increases the vortex core density from 0.01 μm−2 in conventionally poled samples to 21 μm−2. This controlled domain engineering leads to a remarkable improvement in the piezoelectric response, primarily attributed to localized strain surrounding the vortex cores. This study advances our understanding of topological structures in bulk ferroelectrics, and opens up a practical pathway to engineer high-performance ferroelectrics for device applications.