Polarons shape the interlayer exciton emission of MoSe₂/WSe₂ heterobilayers.

ABSTRACT: We present evidence for the strong participation of hot phonons in the photo-physics of interlayer excitons (IXs) in 2H - and 3R - stacked MoSe₂/WSe₂ heterobilayers. Photoluminescence (PL) excitation spectroscopy reveals that excess energy associated with relaxation of intra-layer excitons towards IXs profoundly shapes the overall IX-PL lineshape, while the energy of the spectrally narrow discrete emission lines conventionally associated with trapped moiré IXs remain unaffected. A strikingly uniform line-spacing of the discrete emission lines is observed, along with characteristic temperature and excitation level dependence. Results suggest an entirely new picture of the discrete IX emission in which non-thermal phonons play a crucial role in shaping the spectrum. Exc

SUBMITTER: Soubelet P 

PROVIDER: S-EPMC12489084 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature