Figure 4.

(a). Schematic of the constant line energy k_○/Π²ξ_○σ_○ in terms of the dimensionless cut-off distance δ/σ_○. (b) Schematic of the flexural rigidity $k_1∕{\Pi }^2{\xi }_{\circ }{\sigma }_{\circ }^3$ in terms of the dimensionless cut-off distance δ/σ_○. As is evident from the plots, the change in k_○/Π²ξ_○σ_○ and $k_1∕{\Pi }^2{\xi }_{\circ }{\sigma }_{\circ }^3$ is negligible after δ = 3σ_○. Consequently, the effective cut-off distance after which the potential decays rapidly, can be reasonably approximated by δ = 3σ_○.