Ternary coherent phase diagram on the FCC lattice

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Abstract
In this paper, we describe a general and original method to study the ground state problem, in multicomponent systems. The method is illustrated by considering the nearest neighbour Ising model in ternary FCC lattices, and leads to the occurrence as a ground state of a new phase called L'. The ternary coherent phase diagram is then calculated within the CVM tetrahedron approximation, showing Chat the L' phase displays a stability domain as large as those of the L10 and L12 domains. At low but non-zero temperature, a "quaternary ground state" phase, called L", stabilized by entropy effects, appears in the phase diagram

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