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• W3162308596 abstract "Inelastic neutron scattering (INS) is a key method for studying magnetic excitations in spin systems, including molecular spin clusters. The method has significantly advanced in recent years and now permits to probe the scattering intensity as a function of the energy transfer and the momentum-transfer vector Q. It was recently shown that high molecular symmetry facilitates the analysis of spectra. Point-group symmetry imposes selection rules in isotropic as well as anisotropic spin models. Furthermore, the Q-dependence of the INS intensity may be completely determined by the point-group symmetry of the states involved in a transition, thereby affording a clear separation of dynamics (energies, transition strengths) and geometrical features (Q-dependencies). The present work addresses this issue for anisotropic spin models. We identify a number of cases where the Q-dependence is completely fixed by the point-group symmetry. For six- and eight-membered planar spin rings and two polyhedra (the cube and the icosahedron) we tabulate and plot the corresponding powder-averaged universal intensity functions. The outlined formalism straightforwardly applies to other highly-symmetric systems and should be useful for future analyses of INS spectra by focusing on those features that contain information on either spin dynamics or the point-group symmetry of states." @default.
• W3162308596 created "2021-05-24" @default.
• W3162308596 creator A5031367654 @default.
• W3162308596 date "2021-07-14" @default.
• W3162308596 modified "2023-10-04" @default.
• W3162308596 title "Symmetry-induced universal momentum-transfer dependencies for inelastic neutron scattering on anisotropic spin clusters" @default.
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• W3162308596 doi "https://doi.org/10.1103/physrevb.104.014416" @default.
• W3162308596 hasPublicationYear "2021" @default.
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