Figure 2. Temperature dependence of conductivity.

Measured conductivity (), fit of σ_D + σ_Ball to these data (- - -), ballistic contribution only (···), diffusive contribution (), WL contribution () and the sum of Drude, WL, diffusive and ballistic contributions (). Red symbols correspond to n = 3.9 × 10¹⁵ m⁻² and the black symbols to n = 4.9 × 10¹⁵ m⁻². The crossover from diffusive to ballistic regime of interaction is illustrated by the ballistic contribution vanishing at low T while the diffusive one vanishes at high T.