Figure 3
Panel (a) shows mobility μ versus sheet density N s for all data in Fig. 2. Panel (b) shows conductivity σ versus N s, where σ is expressed in quantum units (e 2/h). Red lines show the best-match model fit for μ(N s) using the equation μ −1 ≈ μ const −1 + N s/a, where a is the constant fit parameter. Arrows indicate directions of time evolution. Colors and symbols identify phases of gas exposure as in Fig. 2.
