חדשות ואירועים

Holon Physics Seminar 13.6.17

A Percolation in the Energy Landscape Underlies Yield in Amorphous Solids
 
Dr. Ido Regev, Ben-Gurion University
 

June 13, 2017  | 14:00 | Room 424/8. 

 
Abstract:
It has recently been shown that yield in amorphous solids under oscillatory shear is a dynamical transition from asymptotically periodic to asymptotically chaotic, diffusive dynamics. However, an understanding of the physics of this transition is lacking. Here we show that the diffusive behavior of the vector of coordinates of the particles comprising an amorphous solid subject to oscillatory shear, indicates that the irreversibility transition results from a percolation transition in the accessible configurations of the energy landscape. The percolation transition provides a way to reconcile the dynamical aspects of the yield transition, such as the appearance of periodic limit cycles, and the statistical/stochastic aspects such as diffusion and critical behavior.