Interfacial ferroelectricity by van der Waals sliding

doi:10.1126/science.abe8177

GSTDTAP > 气候变化

DOI	10.1126/science.abe8177
	Interfacial ferroelectricity by van der Waals sliding
	M. Vizner Stern; Y. Waschitz; W. Cao; I. Nevo; K. Watanabe; T. Taniguchi; E. Sela; M. Urbakh; O. Hod; M. Ben Shalom
	2021-06-25
发表期刊	Science
出版年	2021
英文摘要	Properties of layered van der Waals structures can depend sensitively on the stacking arrangement of constituent layers. This phenomenon has been exploited to engineer superconducting, correlated insulator, and magnetic states. Two groups now show that ferroelectricity can also be engineered through stacking: Parallel-stacked bilayers of hexagonal boron nitride exhibit ferroelectric switching even though the bulk material is not ferroelectric (see the Perspective by Tsymbal). To explore these phenomena, Yasuda et al. used transport measurements, whereas Vizner Stern et al. focused on atomic force microscopy. Science , abd3230 and abe8177, this issue p. [1458][1] and p. [1462][2]; see also abi7296, p. [1389][3] Despite their partial ionic nature, many-layered diatomic crystals avoid internal electric polarization by forming a centrosymmetric lattice at their optimal van der Waals stacking. Here, we report a stable ferroelectric order emerging at the interface between two naturally grown flakes of hexagonal boron nitride, which are stacked together in a metastable non-centrosymmetric parallel orientation. We observe alternating domains of inverted normal polarization, caused by a lateral shift of one lattice site between the domains. Reversible polarization switching coupled to lateral sliding is achieved by scanning a biased tip above the surface. Our calculations trace the origin of the phenomenon to a subtle interplay between charge redistribution and ionic displacement and provide intuitive insights to explore the interfacial polarization and its distinctive “slidetronics” switching mechanism. [1]: /lookup/doi/10.1126/science.abd3230 [2]: /lookup/doi/10.1126/science.abe8177 [3]: /lookup/doi/10.1126/science.abi7296
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/334149
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	M. Vizner Stern,Y. Waschitz,W. Cao,et al. Interfacial ferroelectricity by van der Waals sliding[J]. Science,2021.
APA	M. Vizner Stern.,Y. Waschitz.,W. Cao.,I. Nevo.,K. Watanabe.,...&M. Ben Shalom.(2021).Interfacial ferroelectricity by van der Waals sliding.Science.
MLA	M. Vizner Stern,et al."Interfacial ferroelectricity by van der Waals sliding".Science (2021).