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+/- J Ising model on Archimedean (4,8(2)) lattices

机译:+/- J Ising模型在Archimedean(4,8(2))格上

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摘要

We report results on ground state properties for a +/- J Ising model defined on the Archimedean (4, 8(2)) lattice. The sublattice method is adapted to this system. By means of combinatorics and probability analysis, weight functions are obtained allowing to calculate properties such as frustrated plaquette distribution, frustration length, energy per bond, and fractional content of unfrustrated bonds; these analytic expressions are presented as functions of x (concentration of ferromagnetic bonds). On the other hand, these parameters are also calculated by an exact numerical algorithm applied to a large number of samples for increasing size N (number of spin sites) and values of x in the range [0.0, 1.0]. Analytical and numerical results tend to agree, which makes these two techniques complementary to each other. Finally, comparison is made to results previously reported for other Archimedean lattices. (c) 2006 Elsevier B.V. All rights reserved.
机译:我们报告关于在Archimedean(4,8(2))晶格上定义的+/- J Ising模型的基态属性的结果。子格方法适用于该系统。通过组合和概率分析,获得了权重函数,可以计算诸如挫折的球团分布,挫折的长度,每键的能量以及未挫折的键的分数含量之类的属性;这些解析表达式表示为x(铁磁键的浓度)的函数。另一方面,这些参数也是通过精确数值算法来计算的,该数值算法适用于大量样本,用于增加大小N(自旋位点的数量)和x的值在[0.0,1.0]范围内。分析和数值结果趋于一致,这使得这两种技术相互补充。最后,与先前报告的其他阿基米德格子的结果进行比较。 (c)2006 Elsevier B.V.保留所有权利。

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