Observation of polarization density waves in SrTiO3
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913283335782400 |
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| author | Orenstein, Gal Krapivin, Viktor Huang, Yijing Zhan, Zhuquan Munoz, Gilberto de la Pena Duncan, Ryan A. Nguyen, Quynh Stanton, Jade Teitelbaum, Samuel Yavas, Hasan Sato, Takahiro Hoffmann, Matthias C. Kramer, Patrick Zhang, Jiahao Cavalleri, Andrea Comin, Riccardo Dean, Mark P. M. Disa, Ankit S. Forst, Michael Johnson, Steven L. Mitrano, Matteo Rappe, Andrew M. Reis, David Zhu, Diling Nelson, Keith A. Trigo, Mariano |
| author_facet | Orenstein, Gal Krapivin, Viktor Huang, Yijing Zhan, Zhuquan Munoz, Gilberto de la Pena Duncan, Ryan A. Nguyen, Quynh Stanton, Jade Teitelbaum, Samuel Yavas, Hasan Sato, Takahiro Hoffmann, Matthias C. Kramer, Patrick Zhang, Jiahao Cavalleri, Andrea Comin, Riccardo Dean, Mark P. M. Disa, Ankit S. Forst, Michael Johnson, Steven L. Mitrano, Matteo Rappe, Andrew M. Reis, David Zhu, Diling Nelson, Keith A. Trigo, Mariano |
| contents | The nature of the "failed" ferroelectric transition in SrTiO3 has been a long-standing puzzle in condensed matter physics. A compelling explanation is the competition between ferroelectricity and an instability with a mesoscopic modulation of the polarization. These polarization density waves, which should become especially strong near the quantum critical point, break local inversion symmetry and are difficult to probe with conventional x-ray scattering methods. Here we combine a femtosecond x-ray free electron laser (XFEL) with THz coherent control methods to probe inversion symmetry breaking at finite momenta and visualize the instability of the polarization on nanometer lengthscales in SrTiO3. We find polar-acoustic collective modes that are soft particularly at the tens of nanometer lengthscale. These precursor collective excitations provide evidence for the conjectured mesoscopic modulated phase in SrTiO3. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_17203 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observation of polarization density waves in SrTiO3 Orenstein, Gal Krapivin, Viktor Huang, Yijing Zhan, Zhuquan Munoz, Gilberto de la Pena Duncan, Ryan A. Nguyen, Quynh Stanton, Jade Teitelbaum, Samuel Yavas, Hasan Sato, Takahiro Hoffmann, Matthias C. Kramer, Patrick Zhang, Jiahao Cavalleri, Andrea Comin, Riccardo Dean, Mark P. M. Disa, Ankit S. Forst, Michael Johnson, Steven L. Mitrano, Matteo Rappe, Andrew M. Reis, David Zhu, Diling Nelson, Keith A. Trigo, Mariano Materials Science The nature of the "failed" ferroelectric transition in SrTiO3 has been a long-standing puzzle in condensed matter physics. A compelling explanation is the competition between ferroelectricity and an instability with a mesoscopic modulation of the polarization. These polarization density waves, which should become especially strong near the quantum critical point, break local inversion symmetry and are difficult to probe with conventional x-ray scattering methods. Here we combine a femtosecond x-ray free electron laser (XFEL) with THz coherent control methods to probe inversion symmetry breaking at finite momenta and visualize the instability of the polarization on nanometer lengthscales in SrTiO3. We find polar-acoustic collective modes that are soft particularly at the tens of nanometer lengthscale. These precursor collective excitations provide evidence for the conjectured mesoscopic modulated phase in SrTiO3. |
| title | Observation of polarization density waves in SrTiO3 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2403.17203 |