Long-lived magnons throughout the Brillouin zone of the strong-leg spin ladder (C7H10N)2CuBr4
Abstract
Inelastic neutron scattering is used to measure spin excitations in fully deuterated single crystal samples of the strong-leg antiferromagnetic S=1/2 spin ladder compound (C7H10N)2CuBr4. Sharp resolution-limited magnons are observed across the entire one-dimensional Brillouin zone. The results validate the previously proposed symmetric spin ladder model and provide a reliable estimate of the relevant exchange interactions.
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