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DOI	10.1073/pnas.2007736117
	Interface and surface stabilization of the polarization in ferroelectric thin films
	Gattinoni C.; Strkalj N.; Härdi R.; Fiebig M.; Trassin M.; Spaldin N.A.
发表日期	2020
ISSN	0027-8424
起始页码	28589
结束页码	28595
卷号	117 期号:46
英文摘要	Ferroelectric perovskites present a switchable spontaneous polarization and are promising energy-efficient device components for digital information storage. Full control of the ferroelectric polarization in ultrathin films of ferroelectric perovskites needs to be achieved in order to apply this class of materials in modern devices. However, ferroelectricity itself is not well understood in this nanoscale form, where interface and surface effects become particularly relevant and where loss of net polarization is often observed. In this work, we show that the precise control of the structure of the top surface and bottom interface of the thin film is crucial toward this aim. We explore the properties of thin films of the prototypical ferroelectric lead titanate (PbTiO3) on a metallic strontium ruthenate (SrRuO3) buffer using a combination of computational (density functional theory) and experimental (optical second harmonic generation) methods. We find that the polarization direction and strength are influenced by chemical and electronic processes occurring at the epitaxial interface and at the surface. The polarization is particularly sensitive to adsorbates and to surface and interface defects. These results point to the possibility of controlling the polarization direction and magnitude by engineering specific interface and surface chemistries. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Thin films \| critical thickness \| ferroelectricity \| surface science
语种	英语
scopus关键词	Article; chemical interaction; controlled study; density functional theory; electrochemical analysis; polarization; priority journal; second harmonic generation microscopy; static electricity; stoichiometry
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160198
作者单位	Gattinoni, C., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland; Strkalj, N., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland; Härdi, R., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland; Fiebig, M., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland; Trassin, M., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland; Spaldin, N.A., Department of Materials, ETH Zurich, Zurich, 8093, Switzerland
推荐引用方式 GB/T 7714	Gattinoni C.,Strkalj N.,Härdi R.,et al. Interface and surface stabilization of the polarization in ferroelectric thin films[J],2020,117(46).
APA	Gattinoni C.,Strkalj N.,Härdi R.,Fiebig M.,Trassin M.,&Spaldin N.A..(2020).Interface and surface stabilization of the polarization in ferroelectric thin films.Proceedings of the National Academy of Sciences of the United States of America,117(46).
MLA	Gattinoni C.,et al."Interface and surface stabilization of the polarization in ferroelectric thin films".Proceedings of the National Academy of Sciences of the United States of America 117.46(2020).