Extended Data Fig. 4: Exciton-density- and temperature-dependent exciton transport in the WS2 underlayer.
From: Twist-angle-dependent interlayer exciton diffusion in WS2–WSe2 heterobilayers
The data shown here are from the WS2 underlayer imaged in Fig. 3b. Intralayer exciton shows a normal diffusion with negligible density dependence and become more mobile at lower temperatures. Solid lines are fits using linear functions. The diffusion constants for 295 and 78 K are fitted to be 0.15 ± 0.04 and 0.44 ± 0.03 cm−2 s−1 respectively. The pump and probe photon energies are 3.10 eV and 1.96 eV, respectively.
