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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Linking factors between groundstate p(c) in 2D iso- and anisotropic +/- J Ising models
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Linking factors between groundstate p(c) in 2D iso- and anisotropic +/- J Ising models

机译:二维各向同性和各向异性+/- J Ising模型中基态p(c)之间的链接因子

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For honeycomb, square and triangular lattices we consider the groundstate threshold p(c) of spontaneous absolute magnetization in iso- and anisotropic random +/- J Ising models from so-called uniform classes HCz, SQ(z), TRz,. The class index z(>= 1) gives a fixed number of so-called PAF-bonds on the plaquette perimeter. A PAF-bond is a bond which has a positive (P) probability p to be antiferromagnetic (AF) and the probability 1 - p to be ferromagnetic where p has the same value for all the PAF-bonds in a considered lattice. The non-PAF-bonds in the lattice are ferromagnetic. In [Achilles et al., Physica A 275 (2000) 178], for each of the uniform classes HC1,..., HC6, SQ(1),..., SQ(4), TR1,..., TR3 we proposed a so-called basic minimal (maximal) model to obtain the minimal (maximal) p(c)-value in the underlying class. Moreover, Supported by estimates from simulations, concerning these basic models, we gave presumably exact values for the minimal (maximal) p(c). Here we show that the predicted p(c)-values are linked by meaningful factors. To this end, in essence, z-values (1, 2,..., 6) and coordination numbers (Delta(hc) = 3, Delta(sq) = 4, Delta(tr) = 6) are used. Typical factors are (Delta(sq) - 1)/(Delta(hc) - 1) or z(1)/z(2)>= 1. Especially, the minimal model case, with its 13 basic models fits in very well. Furthermore, for in-between-models of a uniform class, p, is approximated by linear interpolation between p(c,min) and p(c,max) from basic minimal and maximal models. (c) 2005 Elsevier B.V. All rights reserved.
机译:对于蜂窝,正方形和三角形晶格,我们考虑了来自均一类HCz,SQ(z),TRz的各向同性和各向异性随机+/- J Ising模型中自发绝对磁化的基态阈值p(c)。类索引z(> = 1)在球粒周长上给出固定数量的所谓PAF键。 PAF键是这样一种键,它具有正的(P)概率p为反铁磁(AF)和1-p的概率为铁磁,其中p对于所考虑晶格中的所有PAF键均具有相同的值。晶格中的非PAF键是铁磁性的。在[Achilles et al。,Physica A 275(2000)178]中,对于统一类别HC1,...,HC6,SQ(1),...,SQ(4),TR1,..., TR3我们提出了一个所谓的基本最小(最大)模型来获得基础类中的最小(最大)p(c)值。此外,在有关这些基本模型的仿真估计的支持下,我们给出了最小(最大)p(c)的精确值。在这里,我们显示预测的p(c)值由有意义的因素链接。为此,本质上使用z值(1、2,...,6)和协调数(Delta(hc)= 3,Delta(sq)= 4,Delta(tr)= 6)。典型因子为(Delta(sq)-1)/(Delta(hc)-1)或z(1)/ z(2)> =1。特别是最小模型情况及其13个基本模型非常适合。此外,对于统一类的中间模型,p通过基本最小和最大模型中p(c,min)和p(c,max)之间的线性插值来近似。 (c)2005 Elsevier B.V.保留所有权利。

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