近年来，随着纳米检测技术的发展，人们逐渐认识到，畴壁，区别于畴区，可以成为纳电子器件独立的功能单元。但是目前聚焦于畴壁自身的研究尚不够系统和深入，很多问题没有揭示和解决。本项目计划通过对比多种铁电材料中不同类型畴壁的电导现象，揭示畴壁电导的内在机制；研究畴壁两侧极化方向、样品pn型、尺寸及应力等因素对畴壁动性的影响，提出制备稳定导电畴壁的合理方案；最后考察畴壁不同聚集状态下的畴壁动性和导电特性，并力争进一步揭示与铁电涡旋相关的电、磁、力、光新现象。本项目将提出可推广的用于畴壁电导的理论模型，同时为拓扑物理学研究提供更加丰富的内涵。

In recent years, with the development of nano-detection technology, researchers have gradually realized that domain walls, different from domains, could be independent functional units for nanoelectronic devices. Up to now, however, the limited studies focusing on domain walls are less compressive and indepth, and many problems have not been revealed and solved. In this project, we plan to explore the inherent mechanism of domain wall conductance through comparing different types of domain walls in a variety of ferroelectric materials, put forward reasonable scheme for preparing stable conductive domain walls after investigating the effect of polarization direction, pn type, size and stress on the dynamics of domain walls, inspect the mobility and conductivity of domain walls under different aggregation states, and hope to further achieve some new findings on the physical properties of ferroelectric vortices. Finally, we will propose a generalized theoretical model for domain wall conductance, and this study could enrich the connotation of topology in physics.