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Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)

Van der Waals layered CuInP(2)S(6) (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal of CIPS is intimately coupled with ionic migration, often causing erratic and...

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Autores principales: Ming, Wenjie, Huang, Boyuan, Zheng, Sizheng, Bai, Yinxin, Wang, Junling, Wang, Jie, Li, Jiangyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9390982/
https://www.ncbi.nlm.nih.gov/pubmed/35984879
http://dx.doi.org/10.1126/sciadv.abq1232
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author Ming, Wenjie
Huang, Boyuan
Zheng, Sizheng
Bai, Yinxin
Wang, Junling
Wang, Jie
Li, Jiangyu
author_facet Ming, Wenjie
Huang, Boyuan
Zheng, Sizheng
Bai, Yinxin
Wang, Junling
Wang, Jie
Li, Jiangyu
author_sort Ming, Wenjie
collection PubMed
description Van der Waals layered CuInP(2)S(6) (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal of CIPS is intimately coupled with ionic migration, often causing erratic and damaging switching that is highly undesirable for device applications. In this work, we develop an alternative switching mechanism for CIPS using flexoelectric effect, abandoning external electric fields altogether, and the method is motivated by strong correlation between polarization and topography variation of CIPS. Phase-field simulation identifies a critical radius of curvature around 5 μm for strain gradient to be effective, which is realized by engineered topographic surfaces using silver nanowires and optic grating upon which CIPS is transferred to. We also demonstrate mechanical modulation of CIPS on demand via strain gradient underneath a scanning probe, making it possible to engineer multiple polarization states of CIPS for device applications.
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spelling pubmed-93909822022-08-26 Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6) Ming, Wenjie Huang, Boyuan Zheng, Sizheng Bai, Yinxin Wang, Junling Wang, Jie Li, Jiangyu Sci Adv Physical and Materials Sciences Van der Waals layered CuInP(2)S(6) (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal of CIPS is intimately coupled with ionic migration, often causing erratic and damaging switching that is highly undesirable for device applications. In this work, we develop an alternative switching mechanism for CIPS using flexoelectric effect, abandoning external electric fields altogether, and the method is motivated by strong correlation between polarization and topography variation of CIPS. Phase-field simulation identifies a critical radius of curvature around 5 μm for strain gradient to be effective, which is realized by engineered topographic surfaces using silver nanowires and optic grating upon which CIPS is transferred to. We also demonstrate mechanical modulation of CIPS on demand via strain gradient underneath a scanning probe, making it possible to engineer multiple polarization states of CIPS for device applications. American Association for the Advancement of Science 2022-08-19 /pmc/articles/PMC9390982/ /pubmed/35984879 http://dx.doi.org/10.1126/sciadv.abq1232 Text en Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Ming, Wenjie
Huang, Boyuan
Zheng, Sizheng
Bai, Yinxin
Wang, Junling
Wang, Jie
Li, Jiangyu
Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title_full Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title_fullStr Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title_full_unstemmed Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title_short Flexoelectric engineering of van der Waals ferroelectric CuInP(2)S(6)
title_sort flexoelectric engineering of van der waals ferroelectric cuinp(2)s(6)
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9390982/
https://www.ncbi.nlm.nih.gov/pubmed/35984879
http://dx.doi.org/10.1126/sciadv.abq1232
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