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| मुख्य लेखकों: | , , , , , , , , , , , , , , , , , |
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| स्वरूप: | Preprint |
| प्रकाशित: |
2023
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| विषय: | |
| ऑनलाइन पहुंच: | https://arxiv.org/abs/2312.10133 |
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| _version_ | 1866914742231105536 |
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| author | Chen, Hui-Yuan Versteeg, Rolf B. Puppin, Michele Leroy, Ludmila Mankowsky, Roman Bohler, Pirmin Deng, Yunpei Kerkhoff, Linda Mozzanica, Aldo Oggenfuss, Roland Alexander Pradervand, Claude Sander, Mathias Smolentsev, Grigory Vetter, Seraphin Zamofing, Thierry Lemke, Henrik T. Chergui, Majed Mancini, Giulia F. |
| author_facet | Chen, Hui-Yuan Versteeg, Rolf B. Puppin, Michele Leroy, Ludmila Mankowsky, Roman Bohler, Pirmin Deng, Yunpei Kerkhoff, Linda Mozzanica, Aldo Oggenfuss, Roland Alexander Pradervand, Claude Sander, Mathias Smolentsev, Grigory Vetter, Seraphin Zamofing, Thierry Lemke, Henrik T. Chergui, Majed Mancini, Giulia F. |
| contents | We present a new set up for resonant inelastic hard X-ray scattering at the Bernina beamline of SwissFEL with energy, momentum, and temporal resolution. The compact R=0.5 m Johann-type spectrometer can be equipped with up to 3 crystal analysers and allows efficient collection of RIXS spectra. Optical pumping for time-resolved studies can be realized with a broad span of optical wavelengths. We demonstrate the performance of the set-up at overall ~180 meV resolution in a study of ground-state and photoexcited (at 400 nm) honeycomb 5d iridate $α$-$\mathrm{Li_2IrO_3}$. Steady-state RIXS spectra at the Iridium ${L_3}$-edge (11.214 keV) have been collected and are in very good agreement with data collected at synchrotrons. The time-resolved RIXS transients (pumped minus unpumped spectra) exhibit changes in the energy-loss region <2 eV, whose features mostly result from the hopping nature of 5d electrons in the honeycomb lattice. These changes are ascribed to modulations of the Ir-to-Ir intersite transition scattering efficiency, which we associate to a transient screening of the on-site Coulomb interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_10133 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A set-up for Hard X-ray Time-resolved Resonant Inelastic X-ray Scattering at SwissFEL Chen, Hui-Yuan Versteeg, Rolf B. Puppin, Michele Leroy, Ludmila Mankowsky, Roman Bohler, Pirmin Deng, Yunpei Kerkhoff, Linda Mozzanica, Aldo Oggenfuss, Roland Alexander Pradervand, Claude Sander, Mathias Smolentsev, Grigory Vetter, Seraphin Zamofing, Thierry Lemke, Henrik T. Chergui, Majed Mancini, Giulia F. Strongly Correlated Electrons We present a new set up for resonant inelastic hard X-ray scattering at the Bernina beamline of SwissFEL with energy, momentum, and temporal resolution. The compact R=0.5 m Johann-type spectrometer can be equipped with up to 3 crystal analysers and allows efficient collection of RIXS spectra. Optical pumping for time-resolved studies can be realized with a broad span of optical wavelengths. We demonstrate the performance of the set-up at overall ~180 meV resolution in a study of ground-state and photoexcited (at 400 nm) honeycomb 5d iridate $α$-$\mathrm{Li_2IrO_3}$. Steady-state RIXS spectra at the Iridium ${L_3}$-edge (11.214 keV) have been collected and are in very good agreement with data collected at synchrotrons. The time-resolved RIXS transients (pumped minus unpumped spectra) exhibit changes in the energy-loss region <2 eV, whose features mostly result from the hopping nature of 5d electrons in the honeycomb lattice. These changes are ascribed to modulations of the Ir-to-Ir intersite transition scattering efficiency, which we associate to a transient screening of the on-site Coulomb interaction. |
| title | A set-up for Hard X-ray Time-resolved Resonant Inelastic X-ray Scattering at SwissFEL |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2312.10133 |