Tunable transport dynamics of layer-hybridized excitons in a natural van Der Waals homobilayer

Dipolar interactions are fundamental for the thermalization and condensation of bosonic gases at finite times. Excitons with out-of-plane dipoles feature enhanced inter-particle interactions and longer lifetime, thanks to the dipole alignment and the electron-hole wavefunctions separation. In this work, we achieve control over the layer-hybridization of excitonic species in TMDC bilayers, thus changing the interplay between many-body interactions by means of a vertical electric field. Spatiotemporally-resolved studies allow us to characterize hybrid interlayer exciton (hIX) diffusion, revealing different trends of interactions according to the degree of hybridization. Finally, study the emission quantum yield with respect to excitation power and separate contributions of radiative and nonradiative decay mechanisms. Our work provides fundamental information for the implementation of efficient optoelectronic devices based on exciton transport and for the realization of condensation of bosonic gases.