Extended Data Fig. 5: Temperature-dependent PL spectra from the free-standing WS2/WSe2 heterobilayer (sample 2).
From: Enhanced interactions of interlayer excitons in free-standing heterobilayers
a, Measured temperature-dependent PL spectra from the suspended WS2/WSe2 heterobilayer (sample 2, H-type stacking, measured twist angle 51°) with fitting curves for interlayer exciton peaks: IX1 (blue), IX2 (red) and IX3 (green). The excitation power is around 3.5 µW. Black and dark yellow curves are experimental data and accumulative fitting curve, respectively. b, Extracted PL peak energy as a function of temperature, for three interlayer exciton peaks, labelled as IX1, IX2 and IX3. c, Extracted integrated PL intensity as a function of temperature, for three interlayer exciton PL peaks. d, Extracted full width at half maximum (FWHM) of interlayer exciton peaks as a function of temperature. The error bars in (b)–(d) represent the fitting uncertainty (standard deviations) obtained from multiple (>3) fitting analysis.
