Stretched exponential relaxation in the Coulomb glass

摘要

The relaxation of the specific heat and the entropy to their equilibrium values is investigated numerically for the three-dimensional Coulomb glass at very low temperatures. The long time relaxation follows a stretched exponential function, f(t) = f_0 exp [-(t/τ)~β], with the exponent β increasing with the temperature. The relaxation time diverges as an Arrhenius law when T → 0.