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(a) Interaction potential Ums(r) for different effective diameters σ while the other parameters (λ = 0, n = 12) are fixed. (b) Ums(r) for different exponents n with fixed σ = 0.5a and λ = 0. (c) Ums(r) for different (positive) interaction parameters λ, while σ = 0.5a and n = 12 are fixed. (d) Ums(r) when using negative interaction parameters λ (σ = 0.5a and n = 12 fixed).
