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- W4387310010 abstract "Continuous spin excitations are widely recognized as one of the hallmarks of novel spin states in quantum magnets, such as quantum spin liquids (QSLs). Here, we report the observation of such kind of excitations in ${mathrm{K}}_{2}{mathrm{Ni}}_{2}({mathrm{SO}}_{4}{)}_{3}$, which consists of two sets of intersected spin-1 (${mathrm{Ni}}^{2+}$) trillium lattices. Our inelastic neutron scattering measurement on single crystals clearly shows a dominant excitation continuum, which exhibits a distinct temperature-dependent behavior from that of spin waves, and is rooted in strong quantum spin fluctuations. Further using the self-consistent-Gaussian-approximation method, we determine that the fourth- and fifth-nearest-neighbor exchange interactions are dominant. These two bonds together form a unique three-dimensional network of corner-sharing tetrahedra, which we name as a ``hypertrillium'' lattice. Our results provide direct evidence for the existence of QSL features in ${mathrm{K}}_{2}{mathrm{Ni}}_{2}({mathrm{SO}}_{4}{)}_{3}$ and highlight the potential for the hypertrillium lattice to host frustrated quantum magnetism." @default.
- W4387310010 created "2023-10-04" @default.
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- W4387310010 date "2023-10-03" @default.
- W4387310010 modified "2023-10-07" @default.
- W4387310010 title "Continuous Spin Excitations in the Three-Dimensional Frustrated Magnet <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>K</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mo stretchy=false>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi>SO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn…" @default.
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- W4387310010 doi "https://doi.org/10.1103/physrevlett.131.146701" @default.
- W4387310010 hasPublicationYear "2023" @default.
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