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Depth‐Resolved X‐Ray Photoelectron Spectroscopy Evidence of Intrinsic Polar States in HfO 2 ‐Based Ferroelectrics

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العنوان: Depth‐Resolved X‐Ray Photoelectron Spectroscopy Evidence of Intrinsic Polar States in HfO 2 ‐Based Ferroelectrics
المؤلفون: Hill, Megan O, Kim, Ji Soo, Müller, Moritz L, Phuyal, Dibya, Taper, Sunil, Bansal, Manisha, Becker, Maximilian T, Bakhit, Babak, Maity, Tuhin, Monserrat, Bartomeu, Martino, Giuliana Di, Strkalj, Nives, MacManus‐Driscoll, Judith L
بيانات النشر: Wiley
//dx.doi.org/10.1002/adma.202408572
Advanced Materials
سنة النشر: 2024
المجموعة: Apollo - University of Cambridge Repository
مصطلحات موضوعية: hafnia, ferroelectricity, x‐ray photoelectron spectroscopy, electrochemistry
الوصف: Publication status: Published ; Funder: Herschel Smith Fund ; Funder: Cambridge Display Technology Ltd. ; Funder: Winton Programme for the Physics of Sustainability ; Funder: Gianna Angelopoulos Programme for Science, Technology, and Innovation ; Funder: IISER TVM CHPC ; Funder: IISER TVM PMRF ; AbstractThe discovery of ferroelectricity in nanoscale hafnia‐based oxide films has spurred interest in understanding their emergent properties. Investigation focuses on the size‐dependent polarization behavior, which is sensitive to content and movement of oxygen vacancies. Though polarization switching and electrochemical reactions is shown to co‐occur, their relationship remains unclear. This study employs X‐ray photoelectron spectroscopy with depth sensitivity to examine changes in electrochemical states occurring during polarization switching. Contrasting Hf0.5Zr0.5O2 (HZO) with Hf0.88La0.04Ta0.08O2 (HLTO), a composition with an equivalent structure and comparable average ionic radius, electrochemical states are directly observed for specific polarization directions. Lower‐polarization films exhibit more significant electrochemical changes upon switching, suggesting an indirect relationship between polarization and electrochemical state. This research illuminates the complex interplay between polarization and electrochemical dynamics, providing evidence for intrinsic polar states in HfO2‐based ferroelectrics.
نوع الوثيقة: article in journal/newspaper
وصف الملف: application/pdf; text/xml
اللغة: English
Relation: https://www.repository.cam.ac.uk/handle/1810/373628
الاتاحة: https://www.repository.cam.ac.uk/handle/1810/373628
Rights: Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/
رقم الانضمام: edsbas.43CC5C95
قاعدة البيانات: BASE
الوصف
الوصف غير متاح.