Extended Data Fig. 2: Stresses and strains calculated for a sliding AFM tip using the Hertzian contact model.
From: Ferroelastic writing of crystal directions in oxide thin films

Spatial distributions of the shear stress σ13 (a) and the shear strain ε13 (b) under a sliding AFM tip with a loading force FL of 3 μN and a tangential frictional force f. The calculations were performed using a friction coefficient of kf = 0.15. The value of kf between a diamond tip and a well-polished metallic material is known to range from 0.1 to 0.15.