The pursuit of quantum spin liquid (QSL) states in condensed matter physics has drawn attention to kagome antiferromagnets (AFM) where a two-dimensional corner-sharing network of triangles frustrates conventional magnetic orders. While quantum kagome AFMs based on Cu²⁺ (3d⁹, s = 1/2) ions have been extensively studied, there is so far little work beyond copper-based systems. Recently, several new kagome compounds were discovered where Ti³⁺ (d¹) forms the spin 1/2 and F⁻ is the superexchange mediating ligand.[1] In this talk, we will discuss our recent studies, using bulk property and neutron scattering measurements, on single crystals of Cs₈RbK₃Ti₁₂F₄₈ [2] and Cs₈LiNa₃Ti₁₂F₄₈ [3].

References:
[1] Goto, M., Ueda, H. et al. Various disordered ground states and 1/3 magnetization-plateau-like behavior in the S = 1/2 Ti³⁺ kagome lattice antiferromagnets Rb₂NaTi₃F₁₂, Cs₂NaTi₃F₁₂, and Cs₂KTi₃F₁₂. Phys. Rev. B 94, 104432 (2016).
[2] Thennakoon, A., Yokokura, R., Yang, Y. et al. Gapless dispersive continuum in a modulated quantum kagome antiferromagnet. Nat Commun 16, 3939 (2025).
[3] Unpublished