Fig. 4

Physical scenario of exciton diffusion dynamics modulated by phonon scattering and disorder potentials. a Raman mappings of WSe₂ monolayer at 120 K. The color bar represents the normalized intensity of Raman spectra. b Peak frequency shift of in-plane Raman modes. Inset: Schematic atomic displacement of in-plane mode. c Strain-dependent electronic band structure. d Strain-dependent exciton energy. e, f Physical scenario of exciton nonequilibrium dynamics for high and low temperature, respectively. Scale bars are 5 μm