Breaking symmetry for piezoelectricity

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2022-02-10 DOI:10.1126/science.abn2903

Fei Li

引用次数: 5

Abstract

Piezoelectricity, the ability of a material to generate an electric field in response to applied mechanical stress, has been widely used for state-of-the-art electronics, such as medical ultrasound machines, underwater microphones, and vibration and pressure sensors (1, 2). As a basic prerequisite, only materials with a noncentrosymmetric microstructure can potentially be piezoelectric. Thus, the search for piezoelectric materials has been mainly limited to noncentrosymmetric materials. On page 653 of this issue, Park et al. (1) report a record-breaking piezoelectric performance in a centrosymmetric oxide. Instead of starting with a noncentrosymmetric material, the symmetry of the oxide was broken by inserting oxygen vacancies—a type of point defect—and then manipulating these vacancies with an electric field.

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打破压电的对称性

压电是指材料在外加机械应力作用下产生电场的能力，已被广泛应用于最先进的电子设备，如医用超声波机、水下麦克风以及振动和压力传感器（1, 2）。作为基本前提，只有具有非中心对称微结构的材料才有可能成为压电材料。因此，压电材料的研究主要局限于非中心对称材料。在本期第 653 页，Park 等人 (1) 报告了中心对称氧化物的压电性能破纪录。他们并没有从非中心对称材料入手，而是通过插入氧空位（一种点缺陷）打破了氧化物的对称性，然后用电场操纵这些空位。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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