Probing Metastable Domain Dynamics via Automated Experimentation in Piezoresponse Force Microscopy,ACS Nano

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Probing Metastable Domain Dynamics via Automated Experimentation in Piezoresponse Force Microscopy
ACS Nano ( IF 15.8 ) Pub Date : 2021-09-08 , DOI: 10.1021/acsnano.1c05455
Kyle P Kelley ₁ , Yao Ren ₂ , Arvind Dasgupta ₃ , Pravin Kavle ₃ , Stephen Jesse ₁ , Rama K Vasudevan ₁ , Ye Cao ₂ , Lane W Martin _{3,

4} , Sergei V Kalinin ₁

Affiliation

The dynamics of complex topological defects in ferroelectric materials is explored using automated experimentation in piezoresponse force microscopy. Specifically, a complex trigger system (i.e., “FerroBot”) is employed to study metastable domain-wall dynamics in Pb_0.6Sr_0.4TiO₃ thin films. Several regimes of superdomain wall dynamics have been identified, including smooth domain-wall motion and significant reconfiguration of the domain structures. We have further demonstrated that microscopic mechanisms of the domain-wall dynamics can be identified; i.e., domain-wall bending can be separated from irreversible domain reconfiguration regimes. In conjunction, phase-field modeling was used to corroborate the observed mechanisms. As such, the observed superdomain dynamics can provide a model system for classical ferroelectric dynamics, much like how colloidal crystals provide a model system for atomic and molecular systems.

中文翻译：

通过压电响应力显微镜中的自动实验探测亚稳态域动力学

使用压电响应力显微镜中的自动实验探索铁电材料中复杂拓扑缺陷的动力学。具体而言，采用复杂的触发系统（即“FerroBot”）来研究 Pb _0.6 Sr _0.4 TiO ₃薄膜中的亚稳态畴壁动力学。已经确定了几种超畴壁动力学机制，包括平滑的畴壁运动和畴结构的显着重构。我们进一步证明了畴壁动力学的微观机制可以被识别；IE，畴壁弯曲可以与不可逆的畴重新配置机制分开。结合使用相场建模来证实观察到的机制。因此，观察到的超域动力学可以为经典铁电动力学提供模型系统，就像胶体晶体如何为原子和分子系统提供模型系统一样。

更新日期：2021-09-28

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