Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-11-13
Physics
Condensed Matter
Disordered Systems and Neural Networks
10 pages, 6 figures
Scientific paper
We study the phase transition of the $\pm J$ Heisenberg model in three dimensions. Using a dynamical simulation method that removes a drift of the system, the existence of the spin-glass (SG) phase at low temperatures is suggested. The transition temperature is estimated to be $T_{\rm SG} \sim 0.18J$ from both equilibrium and off-equilibrium Monte-Carlo simulations. Our result contradicts the chirality mechanism of the phase transition reported recently by Kawamura which claims that it is not the spins but the chiralities of the spins that are ordered in Heisenberg SG systems.
Endoh S.
Matsubara Fumitaka
Shirakura Takayuki
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