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http://elar.urfu.ru/handle/10995/92647
Название: | Observation of orbital ordering and origin of the nematic order in FeSe |
Авторы: | Cao, R. X. Hu, J. Dong, J. Zhang, J. B. Ye, X. S. Xu, Y. F. Chareev, D. A. Vasiliev, A. N. Wu, B. Zeng, X. H. Wang, Q. L. Wu, G. |
Дата публикации: | 2019 |
Издатель: | Institute of Physics Publishing |
Библиографическое описание: | Observation of orbital ordering and origin of the nematic order in FeSe / R. X. Cao, J. Hu, J. Dong, J. B. Zhang, et al.. — DOI 10.1088/1367-2630/ab4927 // New Journal of Physics. — 2019. — Vol. 10. — Iss. 21. — 103033. |
Аннотация: | In iron-based superconductors the interactions driving the nematic order that breaks the lattice four-fold rotational symmetry in the iron plane may also facilitate the Cooper pairing, but experimental determination of these interactions is challenging because the temperatures of the nematic order and the order of other electronic phases appear to match each other or to be close to each other. Here we performed field-dependent 77Se-nuclear magnetic resonance (NMR) measurements on single crystals of iron-based superconductor FeSe, with magnetic field B 0 up to 16 T. The 77Se-NMR spectra and Knight shift split when the direction of B 0 is away from the direction perpendicular to the iron planes (i.e. B 0 ∥ c) upon cooling in temperature, with a significant change in the distribution and magnitude of the internal magnetic field at the 77Se nucleus, but these do not happen when B 0 is perpendicular to the iron planes, thus demonstrating that there is an orbital ordering. Moreover, stripe-type antiferromagnetism is absent, while giant antiferromagnetic spin fluctuations measured by the NMR spin-lattice relaxation gradually developed starting at ∼40 K, which is far below the nematic order temperature T nem = 89 K. These results provide direct evidence of orbital-driven nematic order in FeSe. © 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. |
Ключевые слова: | FE-BASED SUPERCONDUCTOR NEMATIC ORDER NMRSPIN-LATTICE RELAXATION NUCLEAR MAGNETIC RESONANCE (NMR) ORBITAL ORDERING ANTIFERROMAGNETISM ELECTRON SPIN RESONANCE SPECTROSCOPY IRON-BASED SUPERCONDUCTORS MAGNETIC FIELDS NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY SINGLE CRYSTALS SPIN FLUCTUATIONS ANTIFERROMAGNETIC SPIN FLUCTUATIONS EXPERIMENTAL DETERMINATION INTERNAL MAGNETIC FIELDS LATTICE RELAXATION NEMATIC ORDER NMR SPIN-LATTICE RELAXATION NUCLEAR MAGNETIC RESONANCE(NMR) ORBITAL ORDER NUCLEAR MAGNETIC RESONANCE |
URI: | http://elar.urfu.ru/handle/10995/92647 |
Условия доступа: | info:eu-repo/semantics/openAccess |
Идентификатор SCOPUS: | 85075798403 |
Идентификатор WOS: | 000503455400033 |
Идентификатор PURE: | 11338128 |
ISSN: | 1367-2630 |
DOI: | 10.1088/1367-2630/ab4927 |
Сведения о поддержке: | Chinese Academy of Sciences, CAS: 51477167, 41527802 Ministério da Educação e Ciência, MEC: 2-2017-084 National Natural Science Foundation of China, NSFC: 61474096, 1804291 BK20180890, 20180889 Russian Foundation for Basic Research, RFBR: 17-29-10007 Government Council on Grants, Russian Federation Work at YZU was supported by National Science Foundation of China (NSFC) (Grants #61474096 and 1804291) and NSF of Jiangsu (Grants #BK20180889 and BK20180890), and at CAS by NSFC (Grants# 51477167 and 41527802).DACthanks supports by the program 211 of the Russian Federation Government (RFG), agreement 02.A03.21.0006 and by the RFG Program of Competitive Growth of KFU.ANVthanks supports by Russian Foundation for Basic Research Grant#17-29-10007, by the Ministry of Education and Science of the RFG in the framework of ICP of NUST MISiS (Grant#K2-2017-084), and by Act 211 of RFG, agreements 02.A03.21.0004, 02.A03.21.0006, and 02.A03.21.0011. |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
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10.1088-1367-2630-ab4927.pdf | 906,61 kB | Adobe PDF | Просмотреть/Открыть |
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