High-Resolution Study of Spin Excitations in the Singlet Ground State ofSrCu2(BO3)2

B. D. Gaulin, S. H. Lee, S. Haravifard, J. P. Castellan, A. J. Berlinsky, H. A. Dabkowska, Y. Qiu, J. R. D. Copley
2004 Physical Review Letters  
High resolution, inelastic neutron scattering measurements on SrCu2(BO3)2 reveal the dispersion of the three single triplet excitations continuously across the (H,0) direction within its tetragonal basal plane. These measurements also show distinct Q dependencies for the single and multiple triplet excitations, and that these excitations are largely dispersionless perpendicular to this plane. The temperature dependence of the intensities of these excitations is well described as the complement of the dc-susceptibility of SrCu2(BO3)2.
doi:10.1103/physrevlett.93.267202 pmid:15698016 fatcat:mcoddpetgvhwvivsyxn3j7n6uu