Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric
Recent research on piezoelectric materials is predominantly devoted to enhancing the piezoelectric coefficient, but overlooks its sign, largely because almost all of them exhibit positive longitudinal piezoelectricity. The only experimentally known exception is ferroelectric polymer poly(vinylidene...
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sg-ntu-dr.10356-903042023-07-14T15:52:58Z Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric You, Lu Zhang, Yang Zhou, Shuang Chaturvedi, Apoorva Morris, Samuel A. Liu, Fucai Chang, Lei Ichinose, Daichi Funakubo, Hiroshi Hu, Weijin Wu, Tom Liu, Zheng Dong, Shuai Wang, Junling School of Materials Science & Engineering DRNTU::Engineering::Materials Piezoelectricity Van der Waals Forces Recent research on piezoelectric materials is predominantly devoted to enhancing the piezoelectric coefficient, but overlooks its sign, largely because almost all of them exhibit positive longitudinal piezoelectricity. The only experimentally known exception is ferroelectric polymer poly(vinylidene fluoride) and its copolymers, which condense via weak van der Waals (vdW) interaction and show negative piezoelectricity. Here we report quantitative determination of giant intrinsic negative longitudinal piezoelectricity and electrostriction in another class of vdW solids—two-dimensional (2D) layered ferroelectric CuInP2S6. With the help of single crystal x-ray crystallography and density-functional theory calculations, we unravel the atomistic origin of negative piezoelectricity in this system, which arises from the large displacive instability of Cu ions coupled with its reduced lattice dimensionality. Furthermore, the sizable piezoelectric response and negligible substrate clamping effect of the 2D vdW piezoelectric materials warrant their great potential in nanoscale, flexible electromechanical devices. MOE (Min. of Education, S’pore) Published version 2019-05-30T05:36:33Z 2019-12-06T17:45:17Z 2019-05-30T05:36:33Z 2019-12-06T17:45:17Z 2019 Journal Article You, L., Zhang, Y., Zhou, S., Chaturvedi, A., Morris, S. A., Liu, F., . . . Wang, J. (2019). Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric. Science Advances, 5(4), eaav3780-. doi:10.1126/sciadv.aav3780 https://hdl.handle.net/10356/90304 http://hdl.handle.net/10220/48489 10.1126/sciadv.aav3780 en Science Advances © 2019 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). 10 p. application/pdf |
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DRNTU::Engineering::Materials Piezoelectricity Van der Waals Forces You, Lu Zhang, Yang Zhou, Shuang Chaturvedi, Apoorva Morris, Samuel A. Liu, Fucai Chang, Lei Ichinose, Daichi Funakubo, Hiroshi Hu, Weijin Wu, Tom Liu, Zheng Dong, Shuai Wang, Junling Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
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Recent research on piezoelectric materials is predominantly devoted to enhancing the piezoelectric coefficient, but overlooks its sign, largely because almost all of them exhibit positive longitudinal piezoelectricity. The only experimentally known exception is ferroelectric polymer poly(vinylidene fluoride) and its copolymers, which condense via weak van der Waals (vdW) interaction and show negative piezoelectricity. Here we report quantitative determination of giant intrinsic negative longitudinal piezoelectricity and electrostriction in another class of vdW solids—two-dimensional (2D) layered ferroelectric CuInP2S6. With the help of single crystal x-ray crystallography and density-functional theory calculations, we unravel the atomistic origin of negative piezoelectricity in this system, which arises from the large displacive instability of Cu ions coupled with its reduced lattice dimensionality. Furthermore, the sizable piezoelectric response and negligible substrate clamping effect of the 2D vdW piezoelectric materials warrant their great potential in nanoscale, flexible electromechanical devices. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering You, Lu Zhang, Yang Zhou, Shuang Chaturvedi, Apoorva Morris, Samuel A. Liu, Fucai Chang, Lei Ichinose, Daichi Funakubo, Hiroshi Hu, Weijin Wu, Tom Liu, Zheng Dong, Shuai Wang, Junling |
format |
Article |
author |
You, Lu Zhang, Yang Zhou, Shuang Chaturvedi, Apoorva Morris, Samuel A. Liu, Fucai Chang, Lei Ichinose, Daichi Funakubo, Hiroshi Hu, Weijin Wu, Tom Liu, Zheng Dong, Shuai Wang, Junling |
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You, Lu |
title |
Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
title_short |
Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
title_full |
Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
title_fullStr |
Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
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Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric |
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origin of giant negative piezoelectricity in a layered van der waals ferroelectric |
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2019 |
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https://hdl.handle.net/10356/90304 http://hdl.handle.net/10220/48489 |
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