Abstract
By using a procedure introduced in the previous work, the author considers duality transformations for spin-1/2 lattice systems. The author shows that, in some cases, given a self-dual model, a new self-dual model can be obtained from it. Several examples of this fact are given. In particular the author analyses a system consisting of two interacting Baxter-Wu models, which present close analogies with the Ashkin-Teller model.
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