  Slip avalanches are ubiquitous phenomena occurring in 3D materials under
shear strain and their study contributes immensely to our understanding of
plastic deformation, fragmentation, and earthquakes. So far, little is known
about the role of shear strain in 2D materials. Here we show some evidence of
two-dimensional slip avalanches in exfoliated rhombohedral MoS2, triggered by
shear strain near the threshold level. Utilizing interfacial polarization in
3R-MoS2, we directly probe the stacking order in multilayer flakes and discover
a wide variety of polarization domains with sizes following a power-law
distribution. These findings suggest slip avalanches can occur during the
exfoliation of 2D materials, and the stacking orders can be changed via shear
strain. Our observation has far-reaching implications for developing new
materials and technologies, where precise control over the atomic structure of
these materials is essential for optimizing their properties as well as for our
understanding of fundamental physical phenomena.
