Second spectrum of 1/f noise due to mobility fluctuations: Simulations vs experiments in suspended graphene

Mobility fluctuations have been observed to influence 1/f noise in mesoscopic two-dimensional conductors recent experiments. If such mobility can be assigned clustering/declustering of defects/impurities, the second spectrum should also display character. In this work, we investigate due mobile impurities on a lattice both using kinetic Monte Carlo simulations (periodic boundary conditions either one or two directions) and experiments suspended graphene Corbino geometry. The indicate 1/fδ behavior with δ≃0.8 ± 0.15 for noise, while yield an exponent δ≃0.7 0.3, independent amount adsorbed atoms.