间断(语言学)
材料科学
极地的
曲面(拓扑)
几何学
数学
物理
数学分析
天文
作者
Martina Župančić,Wahib Aggoune,Alexandre Gloter,Georg Hoffmann,Franz Schmidt,Zbigniew Galazka,Daniel Pfützenreuter,Aysha A. Riaz,Christoph Schlueter,Houari Amari,Anna Regoutz,Jutta Schwarzkopf,Thomas Lunkenbein,Oliver Bierwagen,Claudia Draxl,M. Albrecht
出处
期刊:Physical Review Materials
[American Physical Society]
日期:2024-03-29
卷期号:8 (3)
被引量:2
标识
DOI:10.1103/physrevmaterials.8.034602
摘要
Interfacial polar discontinuities play a crucial role in promoting unique two-dimensional electron gases in perovskite systems such as LaInO${}_{3}$/BaSnO${}_{3}$. This study sheds light on the intricate relationship between polar discontinuity compensation and surface segregation, pivotal factors in formation of interfaces. Transmission electron microscopy and density functional theory (DFT) confirm the surface of BaSnO${}_{3}$ (001) are BaO terminated. In contrast, the LaInO${}_{3}$/BaSnO${}_{3}$ interface is found to terminate with SnO2, accompanied by Ba surface segregation as confirmed by electron energy loss spectroscopy and x-ray photoelectron spectroscopy. DFT calculations highlight the significant influence of the polar discontinuity in driving Ba segregation. This study advances our understanding of oxide interfaces by highlighting the critical role of polar discontinuity compensation in shaping the structure of interfaces in perovskite systems.
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