title: Nonequilibrium relaxation and aging scaling of the Coulomb and Bose glass.
abstract: We employ Monte Carlo simulations to investigate the nonequilibrium relaxation properties of the two- and three-dimensional Coulomb glass with different long-range repulsive interactions. Specifically, we explore the aging scaling laws in the two-time density autocorrelation function. We find that, in the time window and parameter range accessible to us, the scaling exponents are not universal, depending on the filling fraction and temperature: As either the temperature decreases or the filling fraction deviates more from half filling, the exponents reflect markedly slower relaxation kinetics. In comparison with a repulsive Coulomb potential, appropriate for impurity states in strongly disordered semiconductors, we observe that, for logarithmic interactions, the soft pseudogap in the density of states is considerably broader, and the dependence of the scaling exponents on external parameters is much weaker. The latter situation is relevant for flux creep in the disorder-dominated Bose glass phase of type-II superconductors subject to columnar pinning centers.
authors.affiliation: Department of Physics (MC 0435), Robeson Hall, 850 West Campus Drive, Virginia Tech, Blacksburg, Virginia 24061, USA and hMetrix LLC, 150 Monument Rd, # 107, Bala Cynwyd, Pennsylvania 19004, USA.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Shimer
authors.affiliation: Department of Physics (MC 0435), Robeson Hall, 850 West Campus Drive, Virginia Tech, Blacksburg, Virginia 24061, USA.
authors.forename: Uwe C
authors.initials: UC
authors.lastname: Täuber
authors.affiliation: Department of Physics (MC 0435), Robeson Hall, 850 West Campus Drive, Virginia Tech, Blacksburg, Virginia 24061, USA.
authors.forename: Michel
authors.initials: M
authors.lastname: Pleimling
mesh_terms: D000465:Algorithms; D005898:Glass; D008962:Models, Theoretical; D009010:Monte Carlo Method; D055585:Physical Phenomena; D013997:Time Factors