 Blume–Capel model

ID: blume-capel-model

The Blume–Capel model is a spin model with

σ_{i} \in {- 1, 0, 1}

H = - J \sum_{⟨ i, j ⟩} σ_{i} σ_{j} + D \sum_{i} σ_{i}^{2} - h \sum_{i} σ_{i} .

Competition between the Ising interaction and the single-ion anisotropy

D

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