Fig. 1: Moiré dynamics of t-BN under uniaxial strain via MD simulations.

A Moiré patterns of the t-BN bilayer with a twist angle of \({{{\rm{\theta }}}}=1^\circ\) under strain along the armchair (AC) and zigzag (ZZ) directions. The AC and ZZ directions are defined from the triangular moiré supercell, as indicated by the arrows. The polarization map is shown using the Local Polarization Registry Index (LPRI), and the distribution of interlayer distance (\(h\)) is illustrated. Model sizes are provided in Fig. S1. B The domain wall width as a function of strain. Domain walls DW1 and DW2 are labeled in (A). C Static friction stress as a function of strain for shear along the AC and ZZ directions. D Evolution of the moiré pattern during the shear process. From I to V, the top BN layer shifts by one periodicity: b_AC = a = 2.5 Å for shear along AC, and b_ZZ = 3/2 × a/√3 = 2.2 Å for shear along ZZ, where \({{{\rm{a}}}}\) is the lattice constant of h-BN. The five steps correspond to the typical forces observed in the force traces (see Fig. S4 in Supplementary Information).