Monte Carlo study of site disordered 3d Heisenberg models in the presence of a magnetic field and a weak random anisotropy
Belkhatir, S. 1Bekhechi, S. 1Southern, B. W.2
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作者信息
1. Univ Abou Bakr Belkaid
2. Univ Manitoba
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Abstract
We study the 3d Heisenberg site disordered model with and without weak random anisotropy D in the presence of a uniform external longitudinal magnetic field using Monte Carlo methods. The spin and the chirality correlation lengths are measured. We provide evidence that the "mixed chiral " phase is a chiral glass at a finite temperature transition TCG > 0, whereas the spin glass temperature transition is at T-SG = 0 for D = 0. In the anisotropic case we find that the model exhibited a strong evidence the occurrence of finite temperature transitions in the both sectors the spin and the chirality. Our estimate of the spin and chirality correlation-length exponents are compatible with our previous values obtained for the same model without anisotropy and the 3d Heisenberg spin glass.(C) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier