Xiangchen Hu, Hongsheng Shi, Xiaoyan Wu, Zeyu Wang, Yi Yu
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Quantitative analysis of atomic migration in lithium-ion conducting oxide solid electrolytes
Direct observation of intrinsic atom migration inside bulk materials is crucial for understanding the ion-conducting property; however, microscopy experiments remain challenging. Here, intrinsic atom migration in bulk lithium-ion conductor La2/3–xLi3xTiO3 was investigated by using aberration-corrected transmission electron microscopy. The atomic migration was triggered by high-energy electron beam irradiation. Through quantitative analysis of high-angle annular dark-field image sequences and estimation of random errors using the 3σ criterion, the subtle contrast variation caused by single atom migration was extracted, in which the validity was further confirmed by image simulations. It provides a simple and feasible methodology for investigating the mechanism of atomic migration in bulk materials.
期刊介绍：
Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology.
In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics.
APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field.
Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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