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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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Ding Y, Chen CC, Zeng Q, Kim HS, Han MJ, Balasubramanian M, Gordon R, Li F, Bai L, Popov D, Heald SM, Gog T, Mao HK, van Veenendaal M. Novel high-pressure monoclinic metallic phase of V2O3. PHYSICAL REVIEW LETTERS 2014; 112:056401. [PMID: 24580615 DOI: 10.1103/physrevlett.112.056401] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 06/03/2023]
Abstract
Vanadium sesquioxide, V2O3, is a prototypical metal-to-insulator system where, in temperature-dependent studies, the transition always coincides with a corundum-to-monoclinic structural transition. As a function of pressure, V2O3 follows the expected behavior of increased metallicity due to a larger bandwidth for pressures up to 12.5 GPa. Surprisingly, for higher pressures when the structure becomes unstable, the resistance starts to increase. Around 32.5 GPa at 300 K, we observe a novel pressure-induced corundum-to-monoclinic transition between two metallic phases, showing that the structural phase transition can be decoupled from the metal-insulator transition. Using x-ray Raman scattering, we find that screening effects, which are strong in the corundum phase, become weakened at high pressures. Theoretical calculations indicate that this can be related to a decrease in coherent quasiparticle strength, suggesting that the high-pressure phase is likely a critical correlated metal, on the verge of Mott-insulating behavior.
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Affiliation(s)
- Yang Ding
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Cheng-Chien Chen
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Qiaoshi Zeng
- Geological and Environmental Sciences, Stanford University, Stanford, California 94305, USA
| | - Heung-Sik Kim
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Myung Joon Han
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | | | | | - Fangfei Li
- HPSynC, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China
| | - Ligang Bai
- HiPSEC and Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada, 89154, USA
| | - Dimitry Popov
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Steve M Heald
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Thomas Gog
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Ho-kwang Mao
- HPSynC, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA and Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, China
| | - Michel van Veenendaal
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA and Department of Physics, Northern Illinois University, De Kalb, Illinois 60115, USA
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Sun YP, Miao Q, Pietzsch A, Hennies F, Schmitt T, Strocov VN, Andersson J, Kennedy B, Schlappa J, Föhlisch A, Gel'mukhanov F, Rubensson JE. Interference between resonant and nonresonant inelastic x-ray scattering. PHYSICAL REVIEW LETTERS 2013; 110:223001. [PMID: 23767717 DOI: 10.1103/physrevlett.110.223001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Indexed: 06/02/2023]
Abstract
A detailed study of inelastic x-ray scattering from the ground state to the 3Σg(3σ(g)(-1)3s(g)1) state of the O2 molecule is presented. The observed angular anisotropy shows that the vibrational excitations within this final state are strongly dependent on the polarization of the incident radiation. The analysis demonstrates that this is a manifestation of interference between resonant and direct nonresonant inelastic x-ray scattering. This interference provides a new tool to monitor nuclear dynamics by relative rotation of the polarization vectors of the incident and scattered photons.
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Affiliation(s)
- Y-P Sun
- School of Science, Shandong University of Technology, ZiBo, 255049 Shandong, People's Republic of China.
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