Piezoelectric domain walls in van der Waals antiferroelectric CuInP2Se6

Andrius Dziaugys, Kyle Kelley, John A. Brehm, Lei Tao, Alexander Puretzky, Tianli Feng, Andrew O’Hara, Sabine Neumayer, Marius Chyasnavichyus, Eugene A. Eliseev, Juras Banys, Yulian Vysochanskii, Feng Ye, Bryan C. Chakoumakos, Michael A. Susner, Michael A. McGuire, Sergei V. Kalinin, Panchapakesan Ganesh, Nina Balke, Sokrates T. Pantelides, Anna N. Morozovska and Petro Maksymovych ()
Additional contact information
Andrius Dziaugys: Vilnius University
Kyle Kelley: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
John A. Brehm: Vanderbilt University
Lei Tao: Vanderbilt University
Alexander Puretzky: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Tianli Feng: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Andrew O’Hara: Vanderbilt University
Sabine Neumayer: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Marius Chyasnavichyus: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Eugene A. Eliseev: Institute for Problems of Materials Science, National Academy of Sciences of Ukraine
Juras Banys: Vilnius University
Yulian Vysochanskii: Uzhgorod University
Feng Ye: Neutron Scattering Division, Oak Ridge National Laboratory
Bryan C. Chakoumakos: Neutron Scattering Division, Oak Ridge National Laboratory
Michael A. Susner: Materials and Manufacturing Directorate, Air Force Research Laboratory
Michael A. McGuire: Materials Science and Technology Division, Oak Ridge National Laboratory
Sergei V. Kalinin: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Panchapakesan Ganesh: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Nina Balke: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory
Sokrates T. Pantelides: Vanderbilt University
Anna N. Morozovska: National Academy of Sciences of Ukraine
Petro Maksymovych: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Polar van der Waals chalcogenophosphates exhibit unique properties, such as negative electrostriction and multi-well ferrielectricity, and enable combining dielectric and 2D electronic materials. Using low temperature piezoresponse force microscopy, we revealed coexistence of piezoelectric and non-piezoelectric phases in CuInP2Se6, forming unusual domain walls with enhanced piezoelectric response. From systematic imaging experiments we have inferred the formation of a partially polarized antiferroelectric state, with inclusions of structurally distinct ferrielectric domains enclosed by the corresponding phase boundaries. The assignment is strongly supported by optical spectroscopies and density-functional-theory calculations. Enhanced piezoresponse at the ferrielectric/antiferroelectric phase boundary and the ability to manipulate this entity with electric field on the nanoscale expand the existing phenomenology of functional domain walls. At the same time, phase-coexistence in chalcogenophosphates may lead to rational strategies for incorporation of ferroic functionality into van der Waals heterostructures, with stronger resilience toward detrimental size-effects.

Date: 2020
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DOI: 10.1038/s41467-020-17137-0

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