Rotational stretched exponential relaxation in random trap–barrier model |
(a) The time dependence of the normalized probability distribution function P (Δ θ , t ) for different angles Δ θ = 5, 10, 15, 20, 25, 30. (b) The time dependence of the rotational relaxation function for a sphere surface. The inset shows the exponential decay of q ( t ). |