Spin excitation and hidden multipolar order in kagome spin ice HoAgGe by inelastic neutron scattering
Spin ices are exotic phases of matter characterized by frustrated spins obeying local ice rules, that minimize the number of spatially isolated magnetic monopoles. In two dimensions, one can similarly define ice rules for in-plane Ising-like spins arranged on a kagome lattice, leading to unique orders and excitations. HoAgGe is the first natural compound to realize kagome spin ice state (Science 367, 1218¿1223 (2020)). One magnetic excitation mode is observed with maximum value of 0.8 meV at ¿ point (-1, 1, 0) at 0.1K. Interestingly, another magnetic excitation below 1.6 meV appears at ¿ point (-2, 2, 0). It seems really unusual, as we would expect the spin wave should be with high intensity in small q range. Such behavior would be related with the effective transverse field (h) acting on the in-plane Ising spins, which would exhibit unique quantum effects. We plan to do inelastic scattering with polarized neutron at THALES to collect details of this special excitation, to determine the related quantum effect.
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The recommended format for citing this dataset in a research publication is in the following format:
ZHAO Kan; Hao Deng; HIESS Arno; STEFFENS Paul and XU Jianhui. (2023). Spin excitation and hidden multipolar order in kagome spin ice HoAgGe by inelastic neutron scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1765
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