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arXiv · 2603.00740

Mechanically Assisted Symmetry Reconstruction for Extraordinary Piezoelectricity

Jinhui Fan·Chonghe Wang·Xiaoyan Lu·Yunpeng Ma·Zijian Hong·Yuzhao Qi·Yanzhe Dong·Xiaoyue Zhang·Chuchu Yang·Yongchun Zou·Xu Zheng·Xiaolong Li·Qian Li·Xiang Xu·Si-Young Choi·Jiyan Dai·Wenwu Cao·Dragan Damjanovic·Hui Li
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Abstract

Active symmetry control - a central challenge in materials science, particularly in ferroelectrics - is achieved via mechanically assisted poling (MAP) guided by thermodynamics and phase - field modeling. This approach yields extraordinary piezoelectric coefficients (about 5,000 pC/N at 24 degC; 11,700 pC/N at 58 degC) together with about 65% optical transmittance in a classic relaxor ferroelectric, Pb(Mg1/3Nb2/3)O3-PbTiO3. Mechanical suppression of undesirable phases stabilizes a reconstructed symmetry with highly ordered domains, verified by multiple characterization techniques. The strategy is validated across several distinct ferroelectric systems. To demonstrate its practical utility, we fabricate a transparent dual-modal wearable sensor integrating continuous blood pressure monitoring via piezoelectricity with photoplethysmographic SpO2 detection, enabling high-fidelity physiological tracking. This work establishes mechanically assisted symmetry reconstruction as a pathway to multifunctional optoelectronic materials and compact wearable health technologies.

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Jinhui Fan, Chonghe Wang, Xiaoyan Lu, Yunpeng Ma, Zijian Hong, Yuzhao Qi, Yanzhe Dong, Xiaoyue Zhang, Chuchu Yang, Yongchun Zou, Xu Zheng, Xiaolong Li, Qian Li, Xiang Xu, Si-Young Choi, Jiyan Dai, Wenwu Cao, Dragan Damjanovic, Hui Li. 2026-02-28. Mechanically Assisted Symmetry Reconstruction for Extraordinary Piezoelectricity. https://arxiv.org/abs/2603.00740

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