论文标题

Spin-3/2 Blume Capel量子模型具有两个随机横向单离子各向异性的临界行为

Critical behavior of the spin-3/2 Blume Capel quantum model with two random transverse single-ion anisotropies

论文作者

Souza, I. J., Godoy, M., de Arruda, A. S., Tunes, T. M.

论文摘要

使用基于Bogoliubov自由能的不等式的方法,我们研究了在存在随机横向单离子各向异性(RTSIA)的情况下Spin-3/2 Blume-Capel量子模型的磁性。通过分析$τ\ timesφ_{x} $,$ m \ timesφ_{x} $和$ m \ timesτ$计划的分析,我们获得了有关各向异性的存在如何影响系统的属性。我们已经表明,与纯模型相比,RTSIA负责更改相图的拓扑结构,从而导致外观三级临界点(TCP)。

Using the approach based on the Bogoliubov inequality for free energy, we have studied the magnetic properties of the spin-3/2 Blume-Capel quantum model in the presence of the random transverse single-ion anisotropy (RTSIA). By analyzis of the phase diagrams in $τ\times φ_{x} $, $m \times φ_{x}$ and $m \times τ$ plans, we have obtained information about how the presence of anisotropy affects the properties of the system. We have shown that the RTSIA is responsible for changing the topology of the phase diagrams, compared to the pure model, leading to the appearance tricritical point (TCP).

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