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Position space renormalization group study of the spin-1 random semi-infinite Blume-Capel model

机译:spin-1随机半无限Blume-Capel模型的位置空间重整化组研究

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We study the spin-1 Blume-Capel model under a random crystal field in the tridimensional semi-infinite case. This has been done by using the real-space renormalization group approximation and specifically the Migdal-Kadanoff technique. Interesting results are obtained, which tell us that the randomness destroys the first order phase transitions and only those of the second order occur. We give the list of nine fixed points and their topology describing the surface critical behavior. Five new types of phase diagram are found with a rich variety of phase transitions, in accordance with the values of the bulk and surface probabilities and the ratios linking bulk and surface interactions.
机译:我们在三维半无限情况下的随机晶体场下研究了spin-1 Blume-Capel模型。这是通过使用实空间重归一化组逼近(特别是Migdal-Kadanoff技术)完成的。获得了有趣的结果,这告诉我们随机性破坏了第一阶相变,只有第二阶相变才发生。我们给出了九个固定点的列表以及它们描述表面临界行为的拓扑。根据体积和表面概率的值以及连接体积和表面相互作用的比率,发现了五种新型的相图,具有多种相变。

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