4.5 Article

Long-range magnetic order in the (S)over-tilde = 1/2 triangular lattice antiferromagnet KCeS2

Journal

SCIPOST PHYSICS
Volume 9, Issue 3, Pages -

Publisher

SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.9.3.041

Keywords

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Funding

  1. German Research Foundation (DFG) through the Collaborative Research Center [SFB 1143, 247310070]
  2. Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter -ct.qmat [EXC 2147, 390858490, HO-4427/3]
  3. European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [796048]
  4. HLD at HZDR
  5. Marie Curie Actions (MSCA) [796048] Funding Source: Marie Curie Actions (MSCA)

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Recently, several putative quantum spin liquid (QSL) states were discovered in (S) over tilde = 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 T-N = 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.

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