When BiFeO3 layers are confined between TbScO3 layers in an epitaxial superlattice, crystallographically orthogonal voltages can induce reversible, non-volatile switching between polar and antipolar states in BiFeO3. This symmetry switch also leads to marked changes in the nonlinear optical response, piezoresponse and resistivity of the system.
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This is a summary of: Caretta, L. et al. Non-volatile electric-field control of inversion symmetry. Nat. Mater. https://doi.org/10.1038/s41563-022-01412-0 (2022).
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Orthogonal electric fields turn on and turn off symmetry in BiFeO3 superlattices. Nat. Mater. 22, 159–160 (2023). https://doi.org/10.1038/s41563-022-01413-z
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DOI: https://doi.org/10.1038/s41563-022-01413-z
