Electric field switching of chiral phonons
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910043602944000 |
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| author | Grimes, Michael Allington, Clifford J. Ueda, Hiroki Romao, Carl P. Kummer, Kurt Kaur, Puneet Wang, Li-Shu Chang, Yao-Wen Yang, Jan-Chi Huang, Shih-Wen Staub, Urs |
| author_facet | Grimes, Michael Allington, Clifford J. Ueda, Hiroki Romao, Carl P. Kummer, Kurt Kaur, Puneet Wang, Li-Shu Chang, Yao-Wen Yang, Jan-Chi Huang, Shih-Wen Staub, Urs |
| contents | Lattice vibrations carrying angular momentum, known as chiral phonons, have emerged as a promising route to control and understand complex material properties, yet their deterministic manipulation remains largely unexplored. Here we demonstrate electric-field switching of phonon angular momentum in the technologically relevant ferroelectric BaTiO3. Using circularly dichroic resonant inelastic X-ray scattering (CD-RIXS) at the oxygen K edge, we directly probe the phonon angular momentum and compare the measured dichroism with first-principles predictions of phonon-mode chirality. We find excellent agreement, revealing a momentum-dependent circular-dichroism contrast that exhibits a reversible gyroelectric effect, stable for at least 15 hours. Our results establish a robust mechanism for non-volatile control of chiral phonons and point towards new opportunities for phonon-based information and energy technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_06144 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electric field switching of chiral phonons Grimes, Michael Allington, Clifford J. Ueda, Hiroki Romao, Carl P. Kummer, Kurt Kaur, Puneet Wang, Li-Shu Chang, Yao-Wen Yang, Jan-Chi Huang, Shih-Wen Staub, Urs Materials Science Strongly Correlated Electrons Lattice vibrations carrying angular momentum, known as chiral phonons, have emerged as a promising route to control and understand complex material properties, yet their deterministic manipulation remains largely unexplored. Here we demonstrate electric-field switching of phonon angular momentum in the technologically relevant ferroelectric BaTiO3. Using circularly dichroic resonant inelastic X-ray scattering (CD-RIXS) at the oxygen K edge, we directly probe the phonon angular momentum and compare the measured dichroism with first-principles predictions of phonon-mode chirality. We find excellent agreement, revealing a momentum-dependent circular-dichroism contrast that exhibits a reversible gyroelectric effect, stable for at least 15 hours. Our results establish a robust mechanism for non-volatile control of chiral phonons and point towards new opportunities for phonon-based information and energy technologies. |
| title | Electric field switching of chiral phonons |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.06144 |