Minimal model for kinetic arrest Export

@article{citeulike:3149762, abstract = {To elucidate slow dynamics in glassy materials, we introduce the figure-8 model in which N hard blocks undergo Brownian motion around a circuit in the shape of a figure 8. This system undergoes kinetic arrest at a critical packing fraction =g\<1, and for g long-time diffusion is controlled by rare, cooperative, \“junction-crossing\” particle rearrangements. We find that the average time between junction crossings JC, and hence the structural relaxation time, does not simply scale with the configurational volume c of transition states, because JC also depends on the time to complete a junction crossing. The importance of these results in understanding cage-breaking dynamics in glassy systems is discussed.}, author = {Pal, P. and O'Hern, C. S. and Blawzdziewicz, J. and Dufresne, E. R. and Stinchcombe, R.}, citeulike-article-id = {3149762}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000078000001011111000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRE/v78/e011111}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevE.78.011111}, doi = {10.1103/PhysRevE.78.011111}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, number = {1}, posted-at = {2008-08-22 18:30:48}, priority = {2}, publisher = {APS}, title = {Minimal model for kinetic arrest}, url = {http://dx.doi.org/10.1103/PhysRevE.78.011111}, volume = {78}, year = {2008} }

TY - JOUR ID - citeulike:3149762 L3 - citeulike-article-id:3149762 N2 - To elucidate slow dynamics in glassy materials, we introduce the figure-8 model in which N hard blocks undergo Brownian motion around a circuit in the shape of a figure 8. This system undergoes kinetic arrest at a critical packing fraction =g<1, and for g long-time diffusion is controlled by rare, cooperative, “junction-crossing” particle rearrangements. We find that the average time between junction crossings JC, and hence the structural relaxation time, does not simply scale with the configurational volume c of transition states, because JC also depends on the time to complete a junction crossing. The importance of these results in understanding cage-breaking dynamics in glassy systems is discussed. IS - 1 JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) TI - Minimal model for kinetic arrest PB - APS VL - 78 AU - Pal, P AU - O'Hern, CS AU - Blawzdziewicz, J AU - Dufresne, ER AU - Stinchcombe, R PY - 2008/// UR - http://dx.doi.org/10.1103/PhysRevE.78.011111 ER -