Long-range magnetic order in the S̃ = 1 / 2 triangular lattice antiferromagnet KCeS 2

Gaël Bastien, Bastian Rubrecht,Ellen Haeussler, Philipp Schlender, Ziba, Zangeneh, Stanislav Avdoshenko,Rajib Sarkar, Alexey Alfonsov, Sven Luther,Yevhen A. Onykiienko, Helen C. Walker,Hannes Kühne, Vadim Grinenko, Zurab, Guguchia, Vladislav Kataev,Hans-Henning Klauss,Liviu Hozoi,Jeroen van den, Brink,Dmytro S. Inosov, Bernd Büchner,Anja U. B. Wolter,Thomas Doert

semanticscholar（2020）

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摘要

Recently, several putative quantum spin liquid (QSL) states were discovered in S̃ = 1/2 rare-earth based triangular-lattice antiferromagnets (TLAF) with the delafossite structure. In order to elucidate the conditions for a QSL to arise, we report here the discovery of a long-range magnetic order in the Ce-based TLAF KCeS2 below TN = 0.38 K, despite the same delafossite structure. Finally, combining various experimental and computational methods, we characterize the crystal electric field scheme, the magnetic anisotropy and the magnetic ground state of KCeS2. Copyright G. Bastien et al. This work is licensed under the Creative Commons Attribution 4.0 International License. Published by the SciPost Foundation. Received 05-06-2020 Accepted 26-08-2020 Published 17-09-2020 Check for updates doi:10.21468/SciPostPhys.9.3.041

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