تقرير
Photoinduced structural dynamics of multiferroic TbMnO$_3$
| العنوان: | Photoinduced structural dynamics of multiferroic TbMnO$_3$ |
|---|---|
| المؤلفون: | Abreu, Elsa, Savoini, Matteo, Boie, Larissa, Beaud, Paul, Esposito, Vincent, Kubli, Martin, Neugebauer, Martin J., Porer, Michael, Staub, Urs, Burganov, Bulat, Dornes, Chris, Rodriguez-Fernandez, Angel, Huber, Lucas, Lantz, Gabriel, Mardegan, José R. L., Parchenko, Sergii, Rittmann, Jochen, Svetina, Cris, Ingold, Gerhard, Johnson, Steven L. |
| المصدر: | Physical Review B 106, 214312 (2022) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | We use time-resolved hard x-ray diffraction to investigate the structural dynamics of the multiferroic insulator TbMnO$_3$ in the low temperature antiferromagnetic and ferroelectrically ordered phase. The lattice response following photoexcitation at 1.55 eV is detected by measuring the (0 2 4) and (1 3 -5) Bragg reflections. A 0.02% tensile strain, normal to the surface, is seen to arise within 20 - 30 ps. The magnitude of this transient strain is over an order of magnitude lower than that predicted from laser-induced heating, which we attribute to a bottleneck in the energy transfer between the electronic and lattice subsystems. The timescale for the transient expansion is consistent with that of previously reported demagnetization dynamics. We discuss a possible relationship between structural and demagnetization dynamics in TbMnO$_3$, in which photoinduced atomic motion modulates the exchange interaction, leading to a destruction of the magnetic order in the system. Comment: 3 figures, 4 footnotes |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.106.214312 |
| URL الوصول: | http://arxiv.org/abs/2201.10009 |
| رقم الأكسشن: | edsarx.2201.10009 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.106.214312 |
|---|