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Kim JK, Casa D, Huang X, Gog T, Kim BJ, Kim J. Montel mirror based collimating analyzer system for high-pressure resonant inelastic X-ray scattering experiments. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:963-969. [PMID: 33566005 DOI: 10.1107/s1600577520005792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 04/27/2020] [Indexed: 06/12/2023]
Abstract
Resonant inelastic X-ray scattering (RIXS) is increasingly playing a significant role in studying highly correlated systems, especially since it was proven capable of measuring low-energy magnetic excitations. However, despite high expectations for experimental evidence of novel magnetic phases at high pressure, unequivocal low-energy spectral signatures remain obscured by extrinsic scattering from material surrounding the sample in a diamond anvil cell (DAC): pressure media, Be gasket and the diamond anvils themselves. A scattered X-ray collimation based medium-energy resolution (∼100 meV) analyzer system for a RIXS spectrometer at the Ir L3-absorption edge has been designed and built to remediate these difficulties. Due to the confocal nature of the analyzer system, the majority of extrinsic scattering is rejected, yielding a clean low-energy excitation spectrum of an iridate Sr2IrO4 sample in a DAC cell. Furthermore, the energy resolution of different configurations of the collimating and analyzing optics are discussed.
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Affiliation(s)
- J K Kim
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Republic of Korea
| | - Diego Casa
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Xianrong Huang
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Thomas Gog
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - B J Kim
- Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 790-784, Republic of Korea
| | - Jungho Kim
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
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Gretarsson H, Ketenoglu D, Harder M, Mayer S, Dill FU, Spiwek M, Schulte-Schrepping H, Tischer M, Wille HC, Keimer B, Yavaş H. IRIXS: a resonant inelastic X-ray scattering instrument dedicated to X-rays in the intermediate energy range. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:538-544. [PMID: 32153295 PMCID: PMC7064114 DOI: 10.1107/s1600577519017119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/21/2019] [Indexed: 06/01/2023]
Abstract
A new resonant inelastic X-ray scattering (RIXS) instrument has been constructed at beamline P01 of the PETRA III synchrotron. This instrument has been named IRIXS (intermediate X-ray energy RIXS) and is dedicated to X-rays in the tender-energy regime (2.5-3.5 keV). The range covers the L2,3 absorption edges of many of the 4d elements (Mo, Tc, Ru, Rh, Pd and Ag), offering a unique opportunity to study their low-energy magnetic and charge excitations. The IRIXS instrument is currently operating at the Ru L3-edge (2840 eV) but can be extended to the other 4d elements using the existing concept. The incoming photons are monochromated with a four-bounce Si(111) monochromator, while the energy analysis of the outgoing photons is performed by a diced spherical crystal analyzer featuring (102) lattice planes of quartz (SiO2). A total resolution of 100 meV (full width at half-maximum) has been achieved at the Ru L3-edge, a number that is in excellent agreement with ray-tracing simulations.
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Affiliation(s)
- Hlynur Gretarsson
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Didem Ketenoglu
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- Department of Engineering Physics, Faculty of Engineering, Ankara University, Ankara 06100, Turkey
| | - Manuel Harder
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Simon Mayer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Frank-Uwe Dill
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Manfred Spiwek
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | | | - Markus Tischer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Hans-Christian Wille
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Bernhard Keimer
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Hasan Yavaş
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- SLAC National Accelerator Laboratory, 2757 Sand Hill Road, Menlo Park, CA 94025, USA
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Kim J, Casa D, Said A, Krakora R, Kim BJ, Kasman E, Huang X, Gog T. Quartz-based flat-crystal resonant inelastic x-ray scattering spectrometer with sub-10 meV energy resolution. Sci Rep 2018; 8:1958. [PMID: 29386577 PMCID: PMC5792644 DOI: 10.1038/s41598-018-20396-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 01/11/2018] [Indexed: 11/18/2022] Open
Abstract
Continued improvement of the energy resolution of resonant inelastic x-ray scattering (RIXS) spectrometers is crucial for fulfilling the potential of this technique in the study of electron dynamics in materials of fundamental and technological importance. In particular, RIXS is the only alternative tool to inelastic neutron scattering capable of providing fully momentum resolved information on dynamic spin structures of magnetic materials, but is limited to systems whose magnetic excitation energy scales are comparable to the energy resolution. The state-of-the-art spherical diced crystal analyzer optics provides energy resolution as good as 25 meV but has already reached its theoretical limit. Here, we demonstrate a novel sub-10 meV RIXS spectrometer based on flat-crystal optics at the Ir-L3 absorption edge (11.215 keV) that achieves an analyzer energy resolution of 3.9 meV, very close to the theoretical value of 3.7 meV. In addition, the new spectrometer allows efficient polarization analysis without loss of energy resolution. The performance of the instrument is demonstrated using longitudinal acoustical and optical phonons in diamond, and magnon in Sr3Ir2O7. The novel sub-10 meV RIXS spectrometer thus provides a window into magnetic materials with small energy scales.
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Affiliation(s)
- Jungho Kim
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States.
| | - D Casa
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States
| | - Ayman Said
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States
| | - Rich Krakora
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States
| | - B J Kim
- Department of Physics, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea.,Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), 77 Cheongam-Ro, Pohang, 790-784, Republic of Korea.,Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569, Stuttgart, Germany
| | - Elina Kasman
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States
| | - Xianrong Huang
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States
| | - T Gog
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, United States.
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