How does a thermal binary crystal break under shear

摘要: When exposed to strong shearing, the particles in a crystal will rearrange and ultimately, break by forming large nonaffine defects. Even for initial stage of this process, only little effort has been devoted understanding breaking process on scale individual particle size thermalized mixed crystals. Here, we explore shear-induced an equimolar two-dimensional binary model with high interaction asymmetry between two different species such that intersecting square sublattice constituents. Using Brownian dynamics computer simulations, show combination shear thermal fluctuations leads characteristic hierarchical scenario where initially, more strongly coupled are thermally distorted, paving way weakly escape from their cage. This turn mobile defects which may finally merge, proliferating cascade defects, triggers final breakage crystal. is marked contrast one-component crystals close melting. Moreover, orientational dependence direction relative orientation compare usual melting without shear. Our results verifiable real-space experiments superparamagnetic colloidal mixtures at pending air-water interface external magnetic field can be induced laser field.