Topological ferroelectric nanostructures induced by mechanical strain in strontium titanate

Literature Information

Publication Date 2019-09-24
DOI 10.1039/C9CP03802G
Impact Factor 3.676
Authors

Kairi Masuda, Lich Le Van, Takahiro Shimada, Takayuki Kitamura


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Abstract

Ferroelectric materials exhibit novel topological polarization configurations due to geometric confinements originating from the material shapes and interfaces at the nanoscale. In this study, we demonstrate that those nontrivial topological ferroelectric nanostructures can be tailored in paraelectric nanoporous materials by mechanical loads using phase-field modeling. That is, in nanoporous strontium titanate, periodically-arrayed ferroelectric nanostructures in the shape of networks are formed due to strain concentrations by mechanical loads, and topological polarization configurations, such as hierarchical vortices, woven fabrics and nested structures of spiral like Hopf fibration, are stabilized in the structures strongly affected by the pore arrangements. Our work indicates that various ferroelectric nanostructures with novel shapes and topologies can be designed by controlling the pore arrangements and strain conditions in nanoporous SrTiO3, and thus provides a new pathway to realize novel topological ferroelectric nanostructures, which are essential for future nanodevices.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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