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M. Vizner Stern, Y. Waschitz, W. Cao, I. Nevo, K. Watanabe, T. Taniguchi, E. Sela, M. Urbakh, O. Hod, M. Ben Shalom
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 unique "slidetronics" switching mechanism.
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Stern, M. V., Waschitz, Y., Cao, W., Nevo, I., Watanabe, K., Taniguchi, T., Sela, E., Urbakh, M., Hod, O., & Shalom, M. B. (2021). Interfacial ferroelectricity by van der Waals sliding. Science, 372(6549), 1462–1466. https://doi.org/10.1126/science.abe8177
Stern, M. Vizner, et al. "Interfacial ferroelectricity by van der Waals sliding." Science, vol. 372, no. 6549, 2021, pp. 1462–1466, https://doi.org/10.1126/science.abe8177.
Stern, M. Vizner, Y. Waschitz, W. Cao, I. Nevo, K. Watanabe, T. Taniguchi, E. Sela, M. Urbakh, O. Hod, and M. Ben Shalom. "Interfacial ferroelectricity by van der Waals sliding." Science 372, no. 6549 (2021): 1462–1466. https://doi.org/10.1126/science.abe8177.
Stern M. V., Waschitz Y., Cao W. [и др.] Interfacial ferroelectricity by van der Waals sliding // Science. — 2021. — Vol. 372, № 6549. — P. 1462–1466. — URL: https://doi.org/10.1126/science.abe8177
@article{stern2021interfacial,
title = {{Interfacial ferroelectricity by van der Waals sliding}},
author = {M. Vizner Stern and Y. Waschitz and W. Cao and I. Nevo and K. Watanabe and T. Taniguchi and E. Sela and M. Urbakh and O. Hod and M. Ben Shalom},
journal = {Science},
year = {2021},
volume = {372},
number = {6549},
pages = {1462--1466},
doi = {10.1126/science.abe8177},
url = {https://doi.org/10.1126/science.abe8177}
}TY - JOUR AU - Stern, M. Vizner AU - Waschitz, Y. AU - Cao, W. AU - Nevo, I. AU - Watanabe, K. AU - Taniguchi, T. AU - Sela, E. AU - Urbakh, M. AU - Hod, O. AU - Shalom, M. Ben TI - Interfacial ferroelectricity by van der Waals sliding JO - Science VL - 372 IS - 6549 SP - 1462 EP - 1466 PY - 2021 DA - 2021/06/10 DO - 10.1126/science.abe8177 UR - https://doi.org/10.1126/science.abe8177 ER -
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