Spin Dependent Quantum Renormalization Factor in the One-Dimensional Heisenberg Antiferromagnetic Systems Determined by Inelastic Neutron Scattering Experiments(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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Inelastic neutron scattering experiments on the one-dimensional Heisenberg antiferromagnetic systems, CsNiCl_3 (S = 1), CsVCl_3 (S = 3/2) and CsCrCl_3 (S = 2), were performed, and the dispersion relation of the magnetic excitations at low temperature (E(q)) as well as the temperature dependence of the inverse magnetic correlation length (κ(T)) were measured. The observed κ(T) for each system was well fitted by the quantum theory, and the exchange constant for each system was determined from κ(T). Evaluating E(q) by using the determined exchange constants, we confirmed that the observed enhancement in the excitation energies compared with the classical excitation energies are in good agreement with the quantum renormalization factors predicted by the quantum Monte Carlo calculations.
社団法人日本物理学会の論文
2004-01-15