Spin wave dispersion, including related quantum effect, of 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 analogy with the electric dipoles in water ice. In two dimensions, one can similarly define ice rules for in-plane Ising-like spins arranged on a kagome lattice, leading to a variety of unique orders and excitations. Based on single crystal neutron diffraction results, HoAgGe is the first natural compound to realize the kagome spin ice state. With incident neutron wavelength 5 Å, centering at elastic scattering point (1/3, 1/3, 0), clearly spin wave excitations appear at 1.5 K on a randomly oriented 20 single crystals pieces. The spin wave has a small gap about 0.2 meV, indicating the Ising anisotropy in the spin Hamiltonian. We plan to further conduct inelastic neutron scattering on the properly oriented crystals to collect useful information on the exchange coupling strength, and related quantum effect, at the ground state, together with the three main magnetic plateaus with magnetic field along b axis below 2 K.
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The recommended format for citing this dataset in a research publication is in the following format:
ZHAO Kan; Hao Deng and STEFFENS Paul. (2021). Spin wave dispersion, including related quantum effect, of kagome spin ice HoAgGe by inelastic neutron scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1735
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