Dynamical Critical Phenomena in three-dimensional Heisenberg Spin Glasses

Details Dynamical Critical Phenomena in three-dimensional Heisenberg Spin Glasses Dynamical Critical Phenomena in three-dimensional Heisenberg Spin Glasses

2002-04-10

arxiv.org/abs/cond-mat/0204225v2

Phys. Rev. B66, 104404 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 19 figures

Scientific paper

10.1103/PhysRevB.66.104404

Spin-glass (SG) and chiral-glass (CG) orderings in three dimensional (3D) Heisenberg spin glass with and without magnetic anisotropy are studied by using large-scale off-equilibrium Monte Carlo simulations. A characteristic time of relaxation, which diverges at a transition temperature in the thermodynamic limit, is obtained as a function of the temperature and the system size. Based on the finite-size scaling analysis for the relaxation time, it is found that in the isotropic Heisenberg spin glass, the CG phase transition occurs at a finite temperature, while the SG transition occurs at a lower temperature, which is compatible with zero. Our results of the anisotropic case support the chirality scenario for the phase transitions in the 3D Heisenberg spin glasses.

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