Nano Lett 24, 13783-13789 (2024)

Since the recent discovery of polar topologies, a recurrentquestion has been how to remotely tune them. Many efforts have focused on thepumping of polar optical phonons from optical methods, but with limitedsuccess, as only switchingbetween specific phases has been achieved so far.Additionally, the correlation between optical pulse characteristics and theresulting phase is poorly understood. Here, we propose an alternative approachand demonstrate the deterministic and dynamical tailoring of polar topologiesusing acoustic phonon excitations. Our second-principles simulations revealthat by pumping specific longitudinal and transverse acoustic phonons, varioustopological textures can be induced in materials like BaTiO3 or PbTiO3. This methodleverages the strong coupling between polarization and strain in thesematerials, enabling predictable and dynamic control of polar patterns. Ourfindings open up an alternative possibility for the manipulation of polartextures, suggesting a promising research direction.

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