Abstract:
Motivated by the observation of a spin-glass transition in almost disorder-free Kagome antiferromagnets, and by the specific form of the effective low-energy model of the S = 1/2, trimerized Kagome antiferromagnet, we investigate the possibility to obtain a spin-glass behavior in two-component, disorder-free models. We concentrate on a toy-model, a modified Ashkin-Teller model in a magnetic field that couples only to one species of spins, for which we prove that a dynamic spin-glass behavior occurs. The dynamics of the magnetization is closely related to that of the underlying Ising model in zero field in which spins and pseudo-spins are intimately coupled. The spin-glass like history dependence of the magnetization is a consequence of the ageing of the underlying Ising model.
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Received 21 September 2001 and Received in final form 16 January 2002
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Mila, F., Dean, D. Dynamic spin-glass behavior in a disorder-free, two-component model of quantum frustrated magnets. Eur. Phys. J. B 26, 301–306 (2002). https://doi.org/10.1140/epjb/e20020093
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DOI: https://doi.org/10.1140/epjb/e20020093