Effects on structure of potential profile of rightward traveling solitons for (a) θ = 30°, (b) θ = 45°, and (c) θ = 75°, with parameters taking as κ_e = 1.52, n_2d(1d) = 0.1, n_i(1d) = 0.2, Z = 0.01, T_{1d (i)} = 10^–5, T_{2d (i)} = 10^–4, T_{i (e)} = 0.3, v_{ph ξ} = 0.045, v_{ph η} = 0.045, M_{1d (2d)} = 150, ε = 0.1, and U₀ = 0.09.