Figure 4

Experiments with film thickness ratio \({\bar{h}}_{\ell }:{\bar{h}}_{{\rm{s}}}\approx \mathrm{1:1}\) and different absolute film thicknesses when the rim height is about \({\rm{\max }}\,{h}_{\ell }\approx 3{\bar{h}}_{\ell }\). Dashed lines: \({\bar{h}}_{\ell }=\mathrm{(248}\pm \mathrm{2)}\,{\rm{nm}}:{\bar{h}}_{{\rm{s}}}=\mathrm{(256}\pm \mathrm{2)}\,{\rm{nm}}\), solid lines: \({\bar{h}}_{\ell }=\mathrm{(117}\pm \mathrm{3)}\,{\rm{nm}}:{\bar{h}}_{{\rm{s}}}=\mathrm{(122}\pm \mathrm{2)}\,{\rm{nm}}\).