Atomic-Scale Measurement of Flexoelectric Polarization at SrTiO_{3} Dislocations

Physical Review Letters
Peng GaoYuichi Ikuhara

Abstract

Owing to the broken translational symmetry at dislocations, a strain gradient naturally exists around the dislocation cores and can significantly influence the electrical and mechanical properties. We use aberration corrected scanning transmission electron microscopy to directly measure the flexoelectric polarization (∼28  μC cm^{-2}) at dislocation cores in SrTiO_{3}. The polarization charges can interact with the nonstoichiometric dislocation cores and thus impact the electrical activities. Our findings can help us to understand the properties of dislocations in perovskite, providing new insights into the design of new devices via defect engineering such as bicrystal fabrication and thin film growth.

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Sep 22, 2017·Ultramicroscopy·Peng GaoYuichi Ikuhara

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Citations

Oct 2, 2019·Physical Chemistry Chemical Physics : PCCP·Kairi MasudaTakayuki Kitamura
May 6, 2019·Physical Review Letters·Xin WenShengping Shen
Nov 5, 2019·Nature Communications·Zhipeng DouPeng Gao
Jun 28, 2019·Nature Communications·Ming-Min YangMarin Alexe
Oct 27, 2018·Nature Communications·Leopoldo Molina-LunaMatias Acosta
Jun 12, 2019·Reports on Progress in Physics·Linze LiXiaoqing Pan
Mar 25, 2021·Nano Letters·Ming WuZheng Wen
Oct 1, 2020·Nature Communications·Shinhee YunChan-Ho Yang
May 5, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Mohammad SaghayezhianJiandi Zhang
Jun 19, 2021·Nature Nanotechnology·Jie JiangJian Shi
Dec 19, 2019·Nano Letters·Hongguang WangHans Boschker
Nov 13, 2021·Nano Letters·Wanrong GengXiuliang Ma

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