Replica symmetry breaking transition of the weakly anisotropic Heisenberg spin glass in magnetic fields.
The spin and the chirality orderings of the three-dimensional Heisenberg spin glass with the weak random anisotropy are studied under applied magnetic fields by equilibrium Monte Carlo simulations. A replica symmetry breaking transition occurs in the chiral sector accompanied by the simultaneous spin-glass order. The ordering behavior differs significantly from that of the Ising spin glass, despite the similarity in the global symmetry. Our observation is consistent with the spin-chirality decoupling-recoupling scenario of a spin-glass transition.
Department of Earth and Space Science, Faculty of Science, Osaka University, Toyonaka 560-0043, Japan.
Daisuke
D
Imagawa
Hikaru
H
Kawamura