自应变碲中铁电极化的柔性电操纵

IF 12.5 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Yan Yan, Xiongyi Liang, Liqiang Wang, Yuxuan Zhang, Jiaming Zhou, Weijun Wang, Zhibo Zhang, Yu Zhou, Irum Firdous, Zhengxun Lai, Wei Wang, Pengshan Xie, Yuecheng Xiong, Walid A. Daoud, Zhiyong Fan, Dong-Myeong Shin, Yong Yang, Yang Lu, Xiao Cheng Zeng, You Meng, Johnny C. Ho
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引用次数: 0

摘要

在传统铁电化合物之外,单元素铁电的实现扩大了铁电材料的范围,使极化机制多样化。然而,在元素铁电体中操纵铁电偶极子的策略仍然没有得到充分的探索,限制了它们的广泛应用。本文介绍了一种通用的柔性电操纵策略来调节一维自应变碲铁电体的铁电和压电极化。在自应变Te中观察到9.55微库仑/平方厘米的大挠曲电场,诱导了18°的极化旋转,与铁电pbtio3化合物中典型的15°旋转相当。与未应变的Te相比,这种实质性的极化旋转使铁电矫顽力提高了165%,压电响应提高了75%。此外,铁电极化的柔性电操纵在器件层面上展示了改进的能量收集性能,超过了大多数现有的同类产品。我们的发现强调了柔性电-铁电耦合在开发高性能单元件机电器件和铁电子学中的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Flexoelectric manipulation of ferroelectric polarization in self-strained tellurium

Flexoelectric manipulation of ferroelectric polarization in self-strained tellurium
Beyond conventional ferroelectric compounds, the realization of single-element ferroelectricity expands the scope of ferroelectric materials and diversifies polarization mechanisms. However, strategies for manipulating ferroelectric dipoles in elemental ferroelectrics remain underexplored, limiting their broader applications. Here, we introduce a universal flexoelectric manipulation strategy to tune the ferroelectric and piezoelectric polarization of one-dimensional self-strained tellurium (Te) ferroelectrics. A substantial flexoelectric field of 9.55 microcoulombs per square centimeter was observed in self-strained Te, inducing a polarization rotation of 18°, comparable to the typical 15° rotation in ferroelectric PbTiO3 compounds. This substantial polarization rotation enhances ferroelectric coercivity by 165% and piezoelectric responses by 75% compared to unstrained Te. Moreover, the flexoelectric manipulation of ferroelectric polarization demonstrated improved energy harvesting performance at the device level, surpassing most existing counterparts. Our findings highlight the crucial role of flexoelectricity-ferroelectricity coupling in developing high-performance single-element electromechanical devices and ferroelectronics.
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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