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원자제어 저차원 전자계 연구단
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Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet

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Title
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
Author(s)
Suzuki H.; Gretarsson H.; Ishikawa H.; Ueda K.; Yang Z.; Liu H.; H. Kim; Kukusta D.; Yaresko A.; Minola M.; Sears J.A.; Francoual S.; Wille H.-C.; Nuss J.; Takagi H.; B. J. Kim; Khaliullin G.; Yavaş H.; Keimer B.
Publication Date
2019-03
Journal
NATURE MATERIALS, v.2019, no.18, pp.563 - 567
Publisher
NATURE PUBLISHING GROUP
Abstract
Ruthenium compounds serve as a platform for fundamental concepts such as spin-triplet superconductivity 1 , Kitaev spin liquids 2–5 and solid-state analogues of the Higgs mode in particle physics 6,7 . 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) 8,9 technique capable of probing collective modes in microcrystals of 4d electron materials. We observe spin waves and spin-state transitions in the honeycomb antiferromagnet SrRu 2 O 6 (ref. 10 ) and use the extracted exchange interactions and measured magnon gap to explain its high Néel temperature 11–16 . We expect that the RIXS method presented here will enable momentum-resolved spectroscopy of a large class of 4d transition-metal compounds. © 2019, The Author(s), under exclusive licence to Springer Nature Limited
URI
https://pr.ibs.re.kr/handle/8788114/5890
ISSN
1476-1122
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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