Giant negative electrostriction and dielectric tunability in a van der Waals layered ferroelectric
Year: 2019
Type: article
Abstract: The interest in ferroelectric van der Waals crystals arises from the potential to realize ultrathin ferroic systems owing to the reduced surface energy of these materials and the layered structure that allows for exfoliation. Here, we quantitatively unravel giant negative electrostriction of van der Waals layered copper indium thiophosphate (CIPS), which exhibits an electrostrictive coefficient ${Q}_{33}$ as high as $\ensuremath{-}3.2\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{4}/{\mathrm{C}}^{2}$ and a resulting bulk piezoelectric coefficient ${d}_{33}$ up to \ensuremath{-}85 pm/V. As a result, the electromechanical response of CIPS is comparable in magnitude to established perovskite ferroelectrics despite possessing a much smaller spontaneous polarization of only a few $\ensuremath{\mu}\mathrm{C}/\mathrm{c}{\mathrm{m}}^{2}$. In the paraelectric state, readily accessible owing to low transition temperatures, CIPS exhibits large dielectric tunability, similar to widely used barium strontium titanate, and as a result both giant and continuously tunable electromechanical response. The persistence of electrostrictive and tunable responses in the paraelectric state indicates that even few-layer films or nanoparticles will sustain significant electromechanical functionality, offsetting the inevitable suppression of ferroelectric properties in the nanoscale limit. These findings can likely be extended to other ferroelectric transition metal thiophosphates and (quasi-) two-dimensional materials, and might facilitate the quest toward alternative ultrathin functional devices incorporating electromechanical response.
Source: Physical Review Materials
Authors: Sabine M. Neumayer, Eugene A. Eliseev, Michael A. Susner, Alexander Tselev, Brian J. Rodriguez, John A. Brehm, Sokrates T. Pantelides, Ganesh Panchapakesan, Stephen Jesse, Sergei V. Kalinin, Michael A. McGuire, Anna N. Morozovska, Petro Maksymovych, Nina Balke
Institutions: University College Dublin, Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, National Academy of Sciences of Ukraine, Frantsevich Institute for Problems in Materials Science, United States Air Force Research Laboratory, Wright-Patterson Air Force Base, UES (United States), U.S. Air Force Research Laboratory Aerospace Systems Directorate, University of Aveiro, Vanderbilt University, Institute of Physics
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Funders: U.S. Department of Defense, U.S. Department of Energy, Battelle, Vanderbilt University, National Research Council, UT-Battelle, National Energy Research Scientific Computing Center, Science Foundation Ireland, Ministerio de Economía y Competitividad, Office of Science, Centro de Investigação em Materiais Cerâmicos e Compósitos, Fundação para a Ciência e a Tecnologia, Basic Energy Sciences, Laboratory Directed Research and Development, Air Force Office of Scientific Research, Oak Ridge National Laboratory, Air Force Research Laboratory
Awards: G121915436, G122673668, G1286236842, G1286251239, G1414775356, G1417438418, G1434927308, G1445641779, G1645119126, G166562317, G1677143136, Quantum Chemical Investigations of Abiotic Dimethylmercury Formation, G1816284028, G203625172, G213222014, G222768804, G2246517767, G2618837358, G2673245850, G2795275917, Far-from-Equilibrium Processing of Ferroelectric Thin Films on Glass and Polymeric Substrates, G2860938689, G30714459, G3083819904, G311420488, G313676650, G3520595661, G365575497, G419881185, G42916606, G4501827968, G4893884145, G498139845, G5076365615, G5115546953, PHYSICS OF COMPLEX MATERIALS SYSTEMS THROUGH THEORY AND MICROSCOPY/EELS, PHYSICS OF COMPLEX MATERIALS SYSTEMS THROUGH THEORY AND MICROSCOPY/EELS, G5296923526, G5437569090, G5648016710, G5694675723, G5849692847, G5884666955, CICECO-Instituto de Materiais de Aveiro, PHYSICS OF COMPLEX MATERIALS SYSTEMS THROUGH THEORY AND MICROSCOPY/EELS, G650090426, G660579501, G6652958823, G675320460, PHYSICS OF COMPLEX MATERIALS SYSTEMS THROUGH THEORY AND MICROSCOPY/EELS, G805243471, G8062308296, G8103039852, G8302724523, G969889393
OpenAlex ID: W2793320031