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首页> 外文期刊>Phase Transitions >Dynamic phase transition and dynamic phase diagrams in the spin-5/2 Blume-Capel model under a time-dependent oscillating external field
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Dynamic phase transition and dynamic phase diagrams in the spin-5/2 Blume-Capel model under a time-dependent oscillating external field

机译:自旋5/2 Blume-Capel模型中依赖于时间的振荡外场下的动态相变和动态相图

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摘要

We calculate the dynamic phase transition (DPT) temperatures and present the dynamic phase diagrams in the kinetic spin-5/2 Blume-Capel model under the presence of a time-dependent oscillating external magnetic field. First, we employ the Glauber transition rates to construct the mean-field dynamic equation. Then, we study the time variation of the average magnetization to find the phases in the system. We also investigate the behaviour of the dynamic magnetization to characterize the nature (continuous and discontinuous) of transition and to obtain the DPT points. We present the dynamic phase diagrams in two different planes. The phase diagrams include the ferromagnetic-5/2 (f5/2), the ferromagnetic-1/2 (f1/2) and paramagnetic (p) fundamental phases. In addition to these fundamental phases, we find 10 mixed phases, depending on the interaction parameters. The phase diagrams display many special points, such as a dynamic tricritical point, a double critical end point, a triple point and a quadruple point.
机译:我们计算动态相变(DPT)温度,并在存在时间依赖性振荡外部磁场的情况下,在动力学spin-5 / 2 Blume-Capel模型中显示动态相图。首先,我们采用Glauber跃迁速率来构建平均场动力学方程。然后,我们研究平均磁化强度的时间变化,以找到系统中的相。我们还研究了动态磁化的行为,以表征过渡的性质(连续和不连续)并获得DPT点。我们展示了两个不同平面中的动态相位图。相图包括铁磁5/2(f5 / 2),铁磁1/2(f1 / 2)和顺磁(p)基本相。除了这些基本阶段外,我们还根据交互参数找到了10个混合阶段。相图显示了许多特殊点,例如动态三临界点,双临界终点,三点和四点。

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