Critical and noncritical jamming of frictional grains
Critical and noncritical jamming of frictional grains
We probe the nature of the jamming transition of frictional granular media by studying their vibrational properties as a function of the applied pressure $p$ and friction coefficient $\ensuremath{\mu}$. The density of vibrational states exhibits a crossover from a plateau at frequencies $\ensuremath{\omega}\ensuremath{\gtrsim}{\ensuremath{\omega}}^{*}(p,\ensuremath{\mu})$ to a linear growth for $\ensuremath{\omega}\ensuremath{\lesssim}{\ensuremath{\omega}}^{*}(p,\ensuremath{\mu})$. We …