Modified self-consistent harmonic approximation and its application to two-dimensional easy-axis quantum ferromagnets
Spirin, D. V.
الأصل · EN
In the paper we describe the modification of self-consistent harmonic approximation for quantum S=1 systems. This method has a number of advantages in comparison with usual SCHA. We apply the method to two-dimensional ferromagnets with easy-axis exchange or single-site anisotropy. The results are in good agreement with Monte-Carlo simulations and pure-quantum SCHA.
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