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CONSTRUCTING THE CRITICAL CURVE FOR A SYMMETRIC TWO-LAYER ISING MODEL

机译:构建对称双层刻度模型的临界曲线

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A numerical method based on the transfer matrix method is developed to calculate the critical temperature of two-layer Ising ferromagnet with a weak inter-layer coupling. The reduced internal energy per site has been accurately calculated for symmetric ferromagnetic case, with the nearest neighbor coupling K_1 = K_2 = K (where K_1 and K_2 are the nearest neighbor interaction in the first and second layers, respectively) with inter-layer coupling J. The critical temperature as a function of the inter-layer coupling , is obtained for very weak inter-layer interactions, ξ<0.1. Also a different function is given for the case of the strong inter-layer interactions (ξ>1). The importance of these relations is due to the fact that there is no well tabulated data for the critical points versus J/K. We find the value of the shift exponent Φ = γ is 1.74 for the system with the same intra-layer interaction and 0.5 for the system with different intra-layer interactions.
机译:开发了一种基于传递矩阵方法的数值方法,以计算具有弱层间耦合的双层均匀铁磁体的临界温度。 对于对称的铁磁性壳精确计算每个站点的内部能量降低,最接近的邻居耦合k_1 = k_2 = k(其中k_1和k_2分别是与层间耦合j的第一和第二层中的最近邻居相互作用) 。作为层间耦合的函数的临界温度用于非常弱的层间相互作用,≥<0.1。 还给出了强大层间相互作用的情况(ξ> 1)的情况下给出了不同的功能。 这些关系的重要性是因为关键点没有良好的列表数据而不是j / k。 我们发现换档指数φ=γ的值为1.74,为系统内部相同的系统内部交互和0.5,具有不同的层内相互作用。

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