Fig. 2: Fitting the relationship between the period and thickness of skyrmions.
From: Absence of critical thickness for polar skyrmions with breaking the Kittel’s law
a-c Fitted relationship between the periods (d) and the thicknesses (h) of polar skyrmions from experiments and simulations with two different methods. One experimental data point is from references37. The error bar in b comes from the statistics of several initial models, as can be detailed in the method section. d The total energy density curves for the STO/PTO/STO trilayers with different thicknesses in the skyrmion lattice models for the determination of the optimal periods in c. The lowest total energy density for each thickness was chosen as the reference. The solid curves and dashed drop lines are guides to the eye. For better visibility, the curves of 2.0 nm and 1.6 nm were shifted downward by 1 × 105 and 2 × 105 J/m3, respectively.
