Abstract
The dynamical structure factor S(q,w) for diluted two-dimensional Heisenberg antiferromagnet Rb2Mn0.598Mg0.402F4 was investigated by means of high resolution (ΔE = 17.5μeV) inelastic neutron scattering below TN. The dynamical exponents in the peak intensity (A(q) ∝ q−y) and the dispersion relation (E(q) ∝ qz) for antiferromagnetic fractons were determined as y = 2.9±0.2 and z = 1.8±0.2, in good agreement with the numerical study. Also, the validity of the scaling based on the single-length-scaling postulate (SLSP) was confirmed.
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