Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5MnO4
| العنوان: | Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5MnO4 |
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| المؤلفون: | Michael Porer, Gabriel Lantz, Markus Braden, J. Rittmann, Steven L. Johnson, Laurenz Rettig, Gerhard Ingold, Urs Staub, Elisabeth M. Bothschafter, O. Schumann, M. Kubli, R. B. Versteeg, Agustinus Agung Nugroho, Vincent Esposito, Paul Beaud, P.H.M. van Loosdrecht, Matteo Savoini |
| المصدر: | Physical Review B. 101 |
| بيانات النشر: | American Physical Society (APS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Diffraction, Materials science, Transition temperature, Order (ring theory), Charge (physics), 02 engineering and technology, Crystal structure, 021001 nanoscience & nanotechnology, Manganite, 01 natural sciences, Photoexcitation, Crystallography, Phase (matter), 0103 physical sciences, 010306 general physics, 0210 nano-technology |
| الوصف: | Time-resolved x-ray diffraction experiments on the half-doped single-layered manganite $\mathrm{P}{\mathrm{r}}_{0.5}\mathrm{C}{\mathrm{a}}_{1.5}\mathrm{Mn}{\mathrm{O}}_{4}$ are used to monitor the ultrafast photoinduced dynamics of the structural distortion associated with the charge and orbital ordering (CO/OO). As in the nonlayered three-dimensional counterpart, the ordered phase melts in less than 100 fs after 800-nm photoexcitation and subsequently partially recovers due to thermal equilibration of electronic and vibrational systems. Photoexciting $\mathrm{P}{\mathrm{r}}_{0.5}\mathrm{C}{\mathrm{a}}_{1.5}\mathrm{Mn}{\mathrm{O}}_{4}$ below the transition temperature of a second structural phase transition that occurs around 146 K (deep inside the CO/OO phase) releases this structural transition, but progresses on a much slower timescale. This additional reduction of crystal symmetry, which we ascribe to a further tilt of the oxygen octahedra, can thus be considered to be only weakly coupled to CO/OO. Furthermore, static hard-x-ray and resonant soft-x-ray diffraction at the $\mathrm{Mn}\phantom{\rule{0.16em}{0ex}}{L}_{2,3}$ edges experiments identify correlations between structural distortions and electronic order in thermal equilibrium. |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6d299264d7fdb15ecaa5591e244f3dae https://doi.org/10.1103/physrevb.101.075119 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........6d299264d7fdb15ecaa5591e244f3dae |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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