Abstract:To solve the 2D square Ising model incorporating anisotropy, we discuss a graphical representation of Kramers-Wannier duality. The method yields an equation relating the critical temperature (Tc
) to the horizontal and vertical coupling constants. The result reproduces the known exact solution by Onsager. The equation derived was utilized to plot Tc
as a function of anisotropy by introducing the ratio (α) of the coupling constants. A phase diagram is then obtained showing T… Show more
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