Figure 2.

(a) Dots: mobility ∑μ as function of temperature for x = 0 (squares), x = 0.05 (spheres), x = 0.1 (triangles), and x = 0.4 (diamonds), determined using the PR-TRMC technique. On fitting these mobilities to μ(T) ∝ T^–p, added as solid lines, we obtained p-values of 1.15 (x = 0), 1.62 (x = 0.05), 1.19 (x = 0.1), and 1.34 (x = 0.4). (b) (n/n₀)∑μ as function of n₀ and temperature for x = 0 (top) and x = 0.1 (bottom). (c) Trap saturation density as a function of temperature for x = 0 (squares), x = 0.05 (spheres), x = 0.1 (triangles), and x = 0.4 (diamonds), obtained from the maximum n/n₀.