Critical relaxation in three-dimensional spin glasses

M. V. Feigel’man, L. Ioffe
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引用次数: 7

Abstract

The analytical theory of slow relaxation of the Ising and vector 3-D spin glasses with the finite range interaction near the freezing transition point T f has been developed. In the Ising case, the maximum relaxation time t max increases as t max ∼(T−T f ) −6 exp[C(T−T f ) −1/4 ]. For the Heisenberg spins t max ∼(T−T f ) −10.5 . It is shown that the inclusion of weak random-anisotropy exchange leads to the Ising asymptotics for t max in the Heisenberg spin glass Theorie analytique de la relaxation lente des verres de spin 3D vectoriels et de ceux d'Ising avec interaction de portee finie pres du point de transition de gel. Croissance du temps maximal de relaxation suivant (T-T f ) −6 exp(C(T−T f ) −1/4 ) dans le cas d'Ising et suivant (T−T f ) −10,5 dans le cas de Heisenberg. Par inclusion de l'echange d'anisotropie faible aleatoire, obtention d'un comportement asymptotique d'Ising pour les verres de spin d'Heisenberg
三维自旋玻璃中的临界弛豫
建立了在冻结过渡点T f附近具有有限范围相互作用的伊辛和矢量三维自旋玻璃慢弛豫的解析理论。在Ising情况下,最大弛豫时间tmax增加为tmax ~ (t−t f)−6 exp[C(t−t f)−1/4]。对于海森堡自旋,t max ~ (t−t f)−10.5。结果表明,在海森堡自旋玻璃理论分析中,弱随机各向异性交换的存在导致了t max的Ising渐近性。温度的最大松弛系数(T-T - f)−6 exp(C(T -T - f)−1/4)与Heisenberg的最大松弛系数(T-T - f)−10,5与Heisenberg的最大松弛系数(T-T - f)−10,5相同。包括交换的各向异性可选性,观察的渐近性和海森堡自旋的渐近性
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