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Title: Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet

Abstract

Ruthenium compounds serve as a platform for fundamental concepts such as spin-triplet superconductivity, Kitaev spin liquids and solid-state analogues of the Higgs mode in particle physics. However, basic questions about the electronic structure of ruthenates remain unanswered, because several key parameters (including Hund’s coupling, spin–orbit coupling and exchange interactions) are comparable in magnitude and their interplay is poorly understood, partly due to difficulties in synthesizing large single crystals for spectroscopic experiments. Here we introduce a resonant inelastic X-ray scattering (RIXS) technique capable of probing collective modes in microcrystals of 4d electron materials. We observe spin waves and spin-state transitions in the honeycomb antiferromagnet SrRu2O6 (ref. 10) and use the extracted exchange interactions and measured magnon gap to explain its high Néel temperature. We expect that the RIXS method presented here will enable momentum-resolved spectroscopy of a large class of 4d transition-metal compounds.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [1];  [1];  [4];  [1]; ORCiD logo [1];  [1];  [5];  [5];  [5]; ORCiD logo [1]; ORCiD logo [6];  [4]; ORCiD logo [1]; ORCiD logo [7]; ORCiD logo [1]
  1. Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany)
  2. Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany); Univ. Stuttgart, Stuttgart (Germany)
  4. Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany); Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); Center for Artificial Low Dimensional Electronic Systems, Inst. for Basic Science (IBS), Pohang (South Korea)
  5. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  6. Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany); Univ. Stuttgart, Stuttgart (Germany); Univ. of Tokyo (Japan)
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1532472
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 18; Journal Issue: 6; Journal ID: ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Suzuki, H., Gretarsson, H., Ishikawa, H., Ueda, K., Yang, Z., Liu, H., Kim, H., Kukusta, D., Yaresko, A., Minola, M., Sears, J. A., Francoual, S., Wille, H. -C., Nuss, J., Takagi, H., Kim, B. J., Khaliullin, G., Yavaş, H., and Keimer, B. Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet. United States: N. p., 2019. Web. doi:10.1038/s41563-019-0327-2.
Suzuki, H., Gretarsson, H., Ishikawa, H., Ueda, K., Yang, Z., Liu, H., Kim, H., Kukusta, D., Yaresko, A., Minola, M., Sears, J. A., Francoual, S., Wille, H. -C., Nuss, J., Takagi, H., Kim, B. J., Khaliullin, G., Yavaş, H., & Keimer, B. Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet. United States. doi:10.1038/s41563-019-0327-2.
Suzuki, H., Gretarsson, H., Ishikawa, H., Ueda, K., Yang, Z., Liu, H., Kim, H., Kukusta, D., Yaresko, A., Minola, M., Sears, J. A., Francoual, S., Wille, H. -C., Nuss, J., Takagi, H., Kim, B. J., Khaliullin, G., Yavaş, H., and Keimer, B. Mon . "Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet". United States. doi:10.1038/s41563-019-0327-2. https://www.osti.gov/servlets/purl/1532472.
@article{osti_1532472,
title = {Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet},
author = {Suzuki, H. and Gretarsson, H. and Ishikawa, H. and Ueda, K. and Yang, Z. and Liu, H. and Kim, H. and Kukusta, D. and Yaresko, A. and Minola, M. and Sears, J. A. and Francoual, S. and Wille, H. -C. and Nuss, J. and Takagi, H. and Kim, B. J. and Khaliullin, G. and Yavaş, H. and Keimer, B.},
abstractNote = {Ruthenium compounds serve as a platform for fundamental concepts such as spin-triplet superconductivity, Kitaev spin liquids and solid-state analogues of the Higgs mode in particle physics. However, basic questions about the electronic structure of ruthenates remain unanswered, because several key parameters (including Hund’s coupling, spin–orbit coupling and exchange interactions) are comparable in magnitude and their interplay is poorly understood, partly due to difficulties in synthesizing large single crystals for spectroscopic experiments. Here we introduce a resonant inelastic X-ray scattering (RIXS) technique capable of probing collective modes in microcrystals of 4d electron materials. We observe spin waves and spin-state transitions in the honeycomb antiferromagnet SrRu2O6 (ref. 10) and use the extracted exchange interactions and measured magnon gap to explain its high Néel temperature. We expect that the RIXS method presented here will enable momentum-resolved spectroscopy of a large class of 4d transition-metal compounds.},
doi = {10.1038/s41563-019-0327-2},
journal = {Nature Materials},
number = 6,
volume = 18,
place = {United States},
year = {2019},
month = {3}
}

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Works referenced in this record:

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Antiferromagnetism at T > 500 K in the layered hexagonal ruthenate SrR u 2 O 6
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Localized itinerant electrons and unique magnetic properties of SrRu 2 O 6
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Electronic structure and the origin of the high ordering temperature in SrRu 2 O 6
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DFT+DMFT study on soft moment magnetism and covalent bonding in SrRu 2 O 6
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Localized-itinerant dichotomy and unconventional magnetism in SrRu2O6
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Dispersion of Magnetic Excitations in the Cuprate La 2 CuO 4 and CaCuO 2 Compounds Measured Using Resonant X-Ray Scattering
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Resonant inelastic x-ray scattering operators for t 2 g orbital systems
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    Works referencing / citing this record:

    Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
    text, January 2019

    • Suzuki, Hakuto; Gretarsson, H.; Ishikawa, H.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2019-01710

    Ruthenium(V) Oxides from Low-Temperature Hydrothermal Synthesis
    journal, March 2014

    • Hiley, Craig I.; Lees, Martin R.; Fisher, Janet M.
    • Angewandte Chemie International Edition, Vol. 53, Issue 17
    • DOI: 10.1002/anie.201310110

    Proximate Kitaev quantum spin liquid behaviour in a honeycomb magnet
    journal, April 2016

    • Banerjee, A.; Bridges, C. A.; Yan, J. -Q.
    • Nature Materials, Vol. 15, Issue 7
    • DOI: 10.1038/nmat4604

    Higgs mode and its decay in a two-dimensional antiferromagnet
    journal, March 2017

    • Jain, A.; Krautloher, M.; Porras, J.
    • Nature Physics, Vol. 13, Issue 7
    • DOI: 10.1038/nphys4077

    Localized-itinerant dichotomy and unconventional magnetism in SrRu2O6
    journal, September 2017


    Resonant inelastic x-ray scattering spectra for electrons in solids
    journal, February 2001