Dislocation-Mediated Conductivity in Oxides: Progress, Challenges, and Opportunities
Dislocation-Mediated Conductivity in Oxides: Progress, Challenges, and Opportunities
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DOI：
10.1021/acsnano.1c01557
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发表时间：
2021-05-27
期刊：
影响因子：
17.1
通讯作者：
Perry, Nicola H.
中科院分区：
文献类型：
--
作者：
Armstrong, Micah D.;Lan, Kai-Wei;Perry, Nicola H.
离子固体中的位错是拓扑扩展缺陷，可以在多个长度尺度上调节成分、应变和电荷。因此，它们提供了额外的度数r。自由定制离子和电子传输超出了本体掺杂固有的限制。传输路径的异质结以及通过多种刺激动态重新配置结构和性质的能力将位错提供给特定的潜在应用，包括存储器、开关、非欧姆电子学、电容电荷存储和单原子催化。tr然而，分离、理解和预测运输行为改变的原因仍然是一个挑战。在这个角度来看，我们首先审查现有的报告中的位错修饰的运输行为的氧化物，以及合成策略和多尺度表征路线，以揭示加工结构性能的关系。我们概述了未来研究的愿景，提出了突出的问题，任务和机会。这一领域的进步将需要高度跨学科的，收敛的计算实验方法，涵盖数量级的长度尺度，并跨越从显微镜和机器学习到电化学力学和点缺陷化学的领域，以运输设计和先进制造。
Dislocations in ionic solids are topological extended defects that modulate composition, strain, and charge over multiple length scales. As such, they provide an extra degree r. of freedom to tailor ionic and electronic transport beyond limits inherent in bulk doping. Heterogeneity of transport paths as well as the ability to dynamically reconfigure structure and properties through multiple stimuli lend dislocations to particular potential applications including memory, switching, non-Ohmic electronics, capacitive charge storage, and single-atom catalysis. tr However, isolating, understanding, and predicting causes of modified transport behavior remain a challenge. In this Perspective, we first review existing reports of dislocation-modified transport behavior in oxides, as well as synthetic strategies and multiscale characterization routes to uncover processing-structure-property relationships. We outline a vision for future research, suggesting outstanding questions, tasks, and opportunities. Advances in this field will require highly interdisciplinary, convergent computational-experimental approaches, covering orders of magnitude in length scale, and spanning fields from microscopy and machine learning to electro-chemo-mechanics and point defect chemistry to transport-by-design and advanced manufacturing.