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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…

无序系统与神经网络 · 物理学 2016-08-31 Mitsuhiro Matsumoto , Koji Hukushima , Hajime Takayama

Spin-glass and chiral-glass orderings of a three-dimensional isotropic Heisenberg spin glass are studied both by equilibrium and off-equilibrium Monte Carlo simulations with emphasis on their dynamical aspects. The model is found to exhibit…

无序系统与神经网络 · 物理学 2007-05-23 H. Kawamura , K. Hukushima

Ordering of the Heisenberg spin glass with the nearest-neighbor Gaussian coupling is investigated by equilibrium Monte Carlo simulations in four and five dimensions. Ordering of the mean-field Heisenberg spin-glass is also studied for…

无序系统与神经网络 · 物理学 2009-11-07 Daisuke Imagawa , Hikaru Kawamura

Extensive equilibrium Monte Carlo simulations are performed for a three-dimensional Heisenberg spin glass with the nearest-neighbor Gaussian coupling to investigate its spin-glass and chiral-glass orderings. The occurrence of a…

无序系统与神经网络 · 物理学 2009-10-31 K. Hukushima , H. Kawamura

The nature of the ordering of the three-dimensional isotropic Heisenberg spin glass with nearest-neighbor random Gaussian coupling is studied by extensive Monte Carlo simulations. Several independent physical quantities are measured both…

无序系统与神经网络 · 物理学 2013-05-29 Dao Xuan Viet , Hikaru Kawamura

Ordering of the three-dimensional Heisenberg spin glass with Gaussian coupling is studied by extensive Monte Carlo simulations. The model undergoes successive chiral-glass and spin-glass transitions at nonzero temperatures T_{CG} > T_{SG} >…

无序系统与神经网络 · 物理学 2012-01-27 Dao Xuan Viet , Hikaru Kawamura

Results of Monte Carlo simulations of XY and Heisenberg spin glass models in three dimensions are presented. A finite size scaling analysis of the correlation length of the spins and chiralities of both models shows that there is a single,…

无序系统与神经网络 · 物理学 2009-11-10 L. W. Lee , A. P. Young

By means of parallel tempering Monte Carlo simulations we find strong evidence for a finite-temperature spin-glass transition in a system of diluted classical Heisenberg dipoles randomly placed on the sites of a simple cubic lattice. We…

无序系统与神经网络 · 物理学 2009-12-18 Pawel Stasiak , Michel J. P. Gingras

Spin and chirality orderings of a three-dimensional XY spin glass are studied by extensive Monte Carlo simulations. By calculating an appropriately defined spin-overlap distribution function, we show that the finite-temperature chiral-glass…

无序系统与神经网络 · 物理学 2009-11-07 Hikaru Kawamura , Mai Suan Li

Equilibrium properties of the three-dimensional isotropic Heisenberg spin glass are studied by extensive Monte Carlo simulations, with particular attention to the nature of its phase transition. A finite-size-scaling analysis is performed…

无序系统与神经网络 · 物理学 2013-05-29 K. Hukushima , H. Kawamura

Spin and chirality orderings of the three-dimensional Heisenberg spin glass are studied under magnetic fields in light of the recently developed spin-chirality decoupling-recoupling scenario. It is found by Monte Carlo simulations that the…

无序系统与神经网络 · 物理学 2009-11-07 Hikaru Kawamura , Daisuke Imagawa

Spin-glass and chiral-glass orderings in three-dimensional Heisenberg spin glasses are studied with and without randaom magnetic anisotropy by dynamical Monte Carlo simulations. In isotropic case, clear evidence of a finite-temperature…

无序系统与神经网络 · 物理学 2009-10-31 Hikaru Kawamura

An overview is given of experimental data on Heisenberg Spin Glass materials so as to make detailed comparisons with numerical results on model Heisenberg spin glasses, with particular reference to the chiral driven ordering transition…

无序系统与神经网络 · 物理学 2015-05-13 I. A Campbell , Dorothée C. M. C. Petit

The ordering of the three-dimensional Heisenberg spin glass with the weak random anisotropy in magnetic fields is studied by extensive equilibrium Monte Carlo simulations. Both the spin and the chirality are monitored. We find strong…

无序系统与神经网络 · 物理学 2009-11-10 Daisuke Imagawa , Hikaru Kawamura

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…

无序系统与神经网络 · 物理学 2007-05-23 F. Matsubara , T. Shirakura , S. Endoh

Spin-glass and chiral-glass orderings in three-dimensional Heisenberg spin glasses are studied both by equilibrium and off-equilibrium Monte Carlo simulations. Fully isotropic model is found to exhibit a finite-temperature chiral-glass…

无序系统与神经网络 · 物理学 2009-10-31 H. Kawamura , K. Hukushima

Recent studies on the spin and the chirality orderings of the three-dimensional Heisenberg spin glass and related systems are reviewed with particular emphasis on the possible spin-chirality decoupling phenomena. Chirality scenario of real…

无序系统与神经网络 · 物理学 2009-11-11 Hikaru Kawamura

We characterize the phase diagram of anisotropic Heisenberg spin glasses, finding both the spin and the chiral glass transition. We remark the presence of strong finite-size effects on the chiral sector. We find a unique phase transition…

无序系统与神经网络 · 物理学 2014-01-22 M. Baity-Jesi , L. A. Fernandez , V. Martin-Mayor , J. M. Sanz

Spin and chirality orderings of the three-dimensional Heisenberg spin glass under magnetic fields are studied by large-scale equilibrium Monte Carlo simulations. It is found that the chiral-glass transition and the chiral-glass ordered…

无序系统与神经网络 · 物理学 2009-11-07 Daisuke Imagawa , Hikaru Kawamura

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…

无序系统与神经网络 · 物理学 2009-11-10 Daisuke Imagawa , Hikaru Kawamura
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