Conceptual Framework for Dislocation-Modified Conductivity in Oxide Ceramics Deconvoluting Mesoscopic Structure, Core, and Space Charge Exemplified for SrTiO3.
Conceptual Framework for Dislocation-Modified Conductivity in Oxide Ceramics Deconvoluting Mesoscopic Structure, Core, and Space Charge Exemplified for SrTiO3.
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DOI：
10.1021/acsnano.0c04491
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发表时间：
2020-11
期刊：
影响因子：
17.1
通讯作者：
L. Porz;T. Frömling;A. Nakamura;Ning Li;Ryohei Maruyama;K. Matsunaga;P. Gao;H. Simons;C. Dietz-C
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文献类型：
--
作者：
L. Porz;T. Frömling;A. Nakamura;Ning Li;Ryohei Maruyama;K. Matsunaga;P. Gao;H. Simons;C. Dietz-C
引入位错是最近提出的一种策略，以定制的功能，特别是陶瓷的电性能。虽然有几项工作证实了位错对电导率的明显影响，但一些研究特别在扩展到几何上易处理的双晶界面之外的位错排列时引起了关注。此外，缺乏一个完整的分类相关的位错特性复杂的系统的讨论和阻碍位错修改的导电性的设计。我们继续通过机械引入三种不同的介观结构的位错到模型材料单晶SrTiO 3和广泛的表征它们从机械和电气的角度来看。作为最终结果，介观结构，核心结构和空间电荷的解卷积使我们能够获得位错对功能特性的影响的完整图像，这里集中在电学特性上。
The introduction of dislocations is a recently proposed strategy to tailor the functional and especially the electrical properties of ceramics. While several works confirm a clear impact of dislocations on electrical conductivity, some studies raise concern in particular when expanding to dislocation arrangements beyond a geometrically tractable bicrystal interface. Moreover, the lack of a complete classification on pertinent dislocation characteristics complicates a systematic discussion and hampers the design of dislocation-modified electrical conductivity. We proceed by mechanically introducing dislocations with three different mesoscopic structures into the model material single-crystal SrTiO3 and extensively characterizing them from both a mechanical as well as an electrical perspective. As a final result, a deconvolution of mesoscopic structure, core structure, and space charge enables us to obtain the complete picture of the effect of dislocations on functional properties, focusing here on electric properties.