The minimal energy density has been found for a dislocation with its axis oriented along the zigzag direction (α = 90◦),
screw dislocation energy density increases logarithmically with the number of layers.
The strongest piezoelectric charge densities are in the layers closest to the dislocation plane.As far a layer is from the dislocation plane, the smaller the charge density.
For a bilayer, the piezoelectric potential (When an external force is applied, the material's internal structure deforms, separating the centers of positive and negative charges) is strong and varies significantly across the dislocation. For tetralayers and hexalayers, the potential weakens in the outer layers, the alternating charges cancel each other.
https://iopscience.iop.org/article/10.1088/2053-1583/ad9f7d
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