Welcome to the next PoreLab lecture!
Who: Prof. José S. Andrade Jr. , from the Universidade Federal do Ceará (UFC), Fortaleza, Brazil
When: Wednesday December 13 at 13:00 (Norway time).
The lecture will be streamed in the Kelvin room (PoreLab Oslo) and in the common room (PoreLab Trondheim). From anywhere else, you will be able to join via the following Zoom link:
Title: Itinerant conductance in fuse-antifuse networks
We report on a novel dynamic phase in electrical networks, in which current channels perpetually change in time. This occurs when the elementary units of the network are fuse-antifuse devices, namely, become insulators within a certain finite interval of local applied voltages. As a consequence, the macroscopic current exhibits temporal fluctuations which increase with system size. We determine the conditions under which this exotic situation appears by establishing a phase diagram as a function of the applied field and the size of the insulating window. Besides its obvious application as a versatile electronic device, due to its rich variety of behaviors, this network model provides a possible description for particle-laden flow through porous media leading to dynamical clogging and reopening of the local channels in the pore space