Hard X-ray Generation and Detection of Nanometer-Scale Localized Coherent Acoustic Wave Packets in SrTiO$_3$ and KTaO$_3$
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866914628045373440 |
|---|---|
| author | Huang, Yijing Sun, Peihao Teitelbaum, Samuel W. Li, Haoyuan Sun, Yanwen Wang, Nan Song, Sanghoon Sato, Takahiro Chollet, Matthieu Osaka, Taito Inoue, Ichiro Duncan, Ryan A. Shin, Hyun D. Haber, Johann Zhou, Jinjian Bernardi, Marco Gu, Mingqiang Rondinelli, James M. Trigo, Mariano Yabashi, Makina Maznev, Alexei A. Nelson, Keith A. Zhu, Diling Reis, David A. |
| author_facet | Huang, Yijing Sun, Peihao Teitelbaum, Samuel W. Li, Haoyuan Sun, Yanwen Wang, Nan Song, Sanghoon Sato, Takahiro Chollet, Matthieu Osaka, Taito Inoue, Ichiro Duncan, Ryan A. Shin, Hyun D. Haber, Johann Zhou, Jinjian Bernardi, Marco Gu, Mingqiang Rondinelli, James M. Trigo, Mariano Yabashi, Makina Maznev, Alexei A. Nelson, Keith A. Zhu, Diling Reis, David A. |
| contents | We demonstrate that the absorption of femtosecond x-ray pulses can excite quasi-spherical high-wavevector coherent acoustic phonon wavepackets using an all x-ray pump and probe scattering experiment. The time- and momentum-resolved diffuse scattering signal is consistent with strain pulses induced by the rapid electron cascade dynamics following photoionization at uncorrelated excitation centers. We quantify key parameters of this process, including the localization size of the strain wavepacket and the energy absorption efficiency, which are determined by the photoelectron and Auger electron cascade dynamics, as well as the electron-phonon interaction. In particular, we obtain the localization size of the observed strain wave packet to be 1.5 and 2.5 nm for bulk SrTiO$_3$ and KTaO$_3$ single crystals, even though there are no nanoscale structures or light-intensity patterns that would ordinarily be required to generate acoustic waves of wavelengths much shorter than the penetration depth. Whereas in GaAs and GaP we do not observe a signal above background. The results provide crucial information on x-ray matter interactions, which sheds light on the mechanism of x-ray energy deposition, and the study of high wavevector acoustic phonons and thermal transport at the nanoscale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_16453 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Hard X-ray Generation and Detection of Nanometer-Scale Localized Coherent Acoustic Wave Packets in SrTiO$_3$ and KTaO$_3$ Huang, Yijing Sun, Peihao Teitelbaum, Samuel W. Li, Haoyuan Sun, Yanwen Wang, Nan Song, Sanghoon Sato, Takahiro Chollet, Matthieu Osaka, Taito Inoue, Ichiro Duncan, Ryan A. Shin, Hyun D. Haber, Johann Zhou, Jinjian Bernardi, Marco Gu, Mingqiang Rondinelli, James M. Trigo, Mariano Yabashi, Makina Maznev, Alexei A. Nelson, Keith A. Zhu, Diling Reis, David A. Materials Science We demonstrate that the absorption of femtosecond x-ray pulses can excite quasi-spherical high-wavevector coherent acoustic phonon wavepackets using an all x-ray pump and probe scattering experiment. The time- and momentum-resolved diffuse scattering signal is consistent with strain pulses induced by the rapid electron cascade dynamics following photoionization at uncorrelated excitation centers. We quantify key parameters of this process, including the localization size of the strain wavepacket and the energy absorption efficiency, which are determined by the photoelectron and Auger electron cascade dynamics, as well as the electron-phonon interaction. In particular, we obtain the localization size of the observed strain wave packet to be 1.5 and 2.5 nm for bulk SrTiO$_3$ and KTaO$_3$ single crystals, even though there are no nanoscale structures or light-intensity patterns that would ordinarily be required to generate acoustic waves of wavelengths much shorter than the penetration depth. Whereas in GaAs and GaP we do not observe a signal above background. The results provide crucial information on x-ray matter interactions, which sheds light on the mechanism of x-ray energy deposition, and the study of high wavevector acoustic phonons and thermal transport at the nanoscale. |
| title | Hard X-ray Generation and Detection of Nanometer-Scale Localized Coherent Acoustic Wave Packets in SrTiO$_3$ and KTaO$_3$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2312.16453 |