Fig. 1: Observation of moiré-trapped IX states in MoS2/WSe2 heterobilayers.
From: Moiré-engineered light-matter interactions in MoS2/WSe2 heterobilayers at room temperature
a Schematic of IXs trapped in moiré potentials, where θ is the twist angle between monolayers. The inset shows the band diagram of MoS2/WSe2 heterobilayer at K valley and the formation of IXs. b The normalized PL spectra of different twisted samples. c Power-dependent PL spectra of a ~0.5° MoS2/WSe2 heterobilayer. The black arrows mark the multiple emission peaks originating from different IX states. d The integrated PL intensity of the different IX states as a function of power with an integrated spectral range of 0.43 meV. The data of IX1 and IX2 are fitted with the formula \(I={I}_{\max }/(1+{P}_{{{{\rm{sat}}}}}/P)\), where Psat is the saturation power. The saturation power for IX1 and IX2 are 144 μW and 714 μW, respectively. The data of IX3 is fitted with a linear equation. e IX emission peak energy versus twist angle. The data is fitted by an exponential function.
