{"title":"Phase transformation on HZO ferroelectric layer in ferroelectric random-access memory induced by x-ray irradiation","authors":"Chung-Wei Wu, Po-Hsun Chen, Ting-Chang Chang, Yung-Fang Tan, Shih-Kai Lin, Yu-Hsuan Yeh, Yong-Ci Zhang, Hsin-Ni Lin, Kai-Chun Chang, Chien-Hung Yeh, Simon Sze","doi":"10.1088/1361-6641/ad1130","DOIUrl":null,"url":null,"abstract":"In this study, electrical measurements on ferroelectric random-access memory by prior x-ray irradiation are conducted. Compared with an unirradiated device, parameters such as current leakage and remnant polarization of the irradiated device were unexpectedly improved. Besides, better reliabilities including the number of endurance times and retention time have also been demonstrated. To clarify the underlying physical mechanism, the electrical properties are analyzed. The current–voltage curve (<italic toggle=\"yes\">I–V</italic>) implies a change in the grain size in the ferroelectric layer (FL), and the capacitance–voltage curve (<italic toggle=\"yes\">C</italic>–<italic toggle=\"yes\">V</italic>) profile indicates that the FL undergoes a phase change during irradiation. Finally, according to the electrical results, a physical model is proposed as an explanation.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1088/1361-6641/ad1130","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, electrical measurements on ferroelectric random-access memory by prior x-ray irradiation are conducted. Compared with an unirradiated device, parameters such as current leakage and remnant polarization of the irradiated device were unexpectedly improved. Besides, better reliabilities including the number of endurance times and retention time have also been demonstrated. To clarify the underlying physical mechanism, the electrical properties are analyzed. The current–voltage curve (I–V) implies a change in the grain size in the ferroelectric layer (FL), and the capacitance–voltage curve (C–V) profile indicates that the FL undergoes a phase change during irradiation. Finally, according to the electrical results, a physical model is proposed as an explanation.
本研究对铁电随机存取存储器进行了预先 X 射线辐照的电学测量。与未经过辐照的器件相比，经过辐照的器件的漏电流和残余极化等参数得到了意想不到的改善。此外，耐久次数和保持时间等可靠性也得到了改善。为了弄清潜在的物理机制，我们对其电气特性进行了分析。电流-电压曲线（I-V）表明铁电层（FL）的晶粒尺寸发生了变化，而电容-电压曲线（C-V）则表明 FL 在辐照过程中发生了相变。最后，根据电学结果，提出了一个物理模型作为解释。
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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