Kovacs-like memory effect in a sheared colloidal glass: role of non-affine flows

Abstract

Memory effect reflects a system's ability to encode, retain and retrieve information about its past. Such effects are essentially an out-of-equilibrium phenomenon providing insight into the complex structural and dynamical behavior of the system. Kovacs effect is one such memory effect that is traditionally associated with thermal history. Although studies on the Kovacs-like memory effect have been extended to mechanical perturbations such as compression-decompression, whether such effects can also be observed under volume-conserving perturbations like shear, remains unclear. Combining experiments, simulations and linear response theory we demonstrate Kovacs-like memory effect in a sheared colloidal glass. Moreover, we explore the influence of non-linear perturbations and establish a correlation between the deviation from linear response prediction and microscopic non-affine flows generated due to such large deformations in affecting the memory effect. Our study not only extends Kovacs-like memory effect in the domain of volume-conserving mechanical perturbations, it also highlights the importance of the nature of underlying microscopic flows in controlling the memory effect in amorphous matter.

9 pages, 5 figures

References in corpus (8)

• Rejuvenation and Memory Effects in a Structural Glass
• Glassy dynamics and memory effects in an intrinsically disordered protein construct
• Giant Kovacs-Like Memory Effect for Active Particles
• Relationships among structure, memory, and flow in sheared disordered materials
• Finite-disorder critical point in the yielding transition of elasto-plastic models
• Kovacs-like memory effect in athermal systems: linear response analysis
• Memory in Non-Monotonic Stress Response of an Athermal Disordered Solid
• Inter-particle adhesion induced strong mechanical memory in a dense granular suspension