Mechanical Softness of Ferroelectric 180° Domain Walls MECHANICAL SOFTNESS of FERROELECTRIC 180 DEGREE ... STEFANI CHRISTINA et al.

Christina Stefani; Louis Ponet; Konstantin Shapovalov; Peng Chen; Eric Langenberg; Darrell G. Schlom; Sergey Artyukhin; Massimiliano Stengel; Neus Domingo; Gustau Catalan

doi:10.1103/PhysRevX.10.041001

Mechanical Softness of Ferroelectric 180° Domain Walls MECHANICAL SOFTNESS of FERROELECTRIC 180 DEGREE ... STEFANI CHRISTINA et al.

Christina Stefani, Louis Ponet, Konstantin Shapovalov, Peng Chen, Eric Langenberg, Darrell G. Schlom, Sergey Artyukhin, Massimiliano Stengel, Neus Domingo, Gustau Catalan

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Using scanning probe microscopy, we measure the out-of-plane mechanical response of ferroelectric 180° domain walls and observe that, despite separating domains that are mechanically identical, the walls appear mechanically distinct-softer-compared to the domains. This effect is observed in different ferroelectric materials (LiNbO3, BaTiO3, and PbTiO3) and with different morphologies (from single crystals to thin films), suggesting that the effect is universal. We propose a theoretical framework that explains the domain wall softening and justifies that the effect should be common to all ferroelectrics. The lesson is, therefore, that domain walls are not only functionally different from the domains they separate, but also mechanically distinct.

Original language	English
Article number	041001
Journal	Physical Review X
Volume	10
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevX.10.041001
State	Published - Oct 2020
Externally published	Yes

Funding

C. S. thanks BIST for the PREBIST Grant. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754558. E. L. acknowledges the funding received from the European Union’s Horizon 2020 research and innovation program through the Marie Skłodowska-Curie Actions: Individual Fellowship-Global Fellowship (Ref. No. MSCA-IF-GF-708129). M. S. and K. S. acknowledge the support of the European Research Council under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 724529), Ministerio de Economia, Industria y Competitividad through Grants No. MAT2016-77100-C2-2-P and No. SEV-2015-0496, and the Generalitat de Catalunya (Grant No. 2017SGR 1506). G. C. acknowledge the support of the Ministerio de Economía, Industria y Competitividad, Agencia Estatal de Investigación/Fondo Europeo de Desarrollo Regional and European Union through Grant No. MAT2016-77100-C2-1-P (MINECO/AEI/FEDER, UE).

Funders	Funder number
European Union’s Horizon 2020 Research and Innovation Program
Fondo Europeo de Desarrollo Regional and European Union	MAT2016-77100-C2-1-P
MINECO/AEI/FEDER
Horizon 2020 Framework Programme	708129, 724529
H2020 Marie Skłodowska-Curie Actions	MSCA-IF-GF-708129, 754558
European Research Council
Generalitat de Catalunya	2017SGR 1506
Ministerio de Economía y Competitividad	SEV-2015-0496, MAT2016-77100-C2-2-P
Ministerio de Economía, Industria y Competitividad, Gobierno de España
Agencia Estatal de Investigación

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10.1103/PhysRevX.10.041001

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title = "Mechanical Softness of Ferroelectric 180° Domain Walls MECHANICAL SOFTNESS of FERROELECTRIC 180 DEGREE ... STEFANI CHRISTINA et al.",

abstract = "Using scanning probe microscopy, we measure the out-of-plane mechanical response of ferroelectric 180° domain walls and observe that, despite separating domains that are mechanically identical, the walls appear mechanically distinct-softer-compared to the domains. This effect is observed in different ferroelectric materials (LiNbO3, BaTiO3, and PbTiO3) and with different morphologies (from single crystals to thin films), suggesting that the effect is universal. We propose a theoretical framework that explains the domain wall softening and justifies that the effect should be common to all ferroelectrics. The lesson is, therefore, that domain walls are not only functionally different from the domains they separate, but also mechanically distinct.",

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AU - Artyukhin, Sergey

AU - Stengel, Massimiliano

AU - Domingo, Neus

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Mechanical Softness of Ferroelectric 180° Domain Walls MECHANICAL SOFTNESS of FERROELECTRIC 180 DEGREE ... STEFANI CHRISTINA et al.

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