Dynamical critical phenomena in three-dimensional Heisenberg spin glasses

Article

关键词: POTTS GLASS;    ISING-MODEL;    FIELD;    TRANSITION;    SIMULATION;   

DOI  :  10.1103/PhysRevB.66.104404

来源: SCIE

【 摘 要 】

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.

【 授权许可】

Free