Upper panels display the spin texture for three selected propagation momenta: Panels (a)–(c) correspond tok_xl₀= −0.76, 0, 0.76, respectively where arrow length is proportional to the spin density. We setΔ_R= 0.2 andΔ_D= 0.1 and assume magnetic field of 1 T applied parallel to the wire. Lower panel (d) presents the dependence of spin expectation values in the lowest subband onk_xl₀. Blue lines indicate ⟨σ_x⟩ whereas red lines represent ⟨σ_y⟩. Dotted lines stand for the case with no SO interaction, dashed curves are forΔ_R= 0.2 andB= 1 T case, and the results when both SO interactions taken into account are given by solid lines.