François Dubin, INSP Paris

Thursday September 23 at 2:00 pm (GMT+2) Paris time

From Superfluids to Mott Insulators with Dipolar Excitons

Semiconductor excitons are composite bosons made by the Coulomb attraction between electrons and holes. Enforcing a spatial separation between these carriers provides a well oriented electric dipole to excitons, which then become model dipolar quasi-particles to explore collective quantum phenomena in the solid-state. In this presentation I will illustrate this assertion by presenting recent experiments where dipolar excitons are confined in two-dimensional lattice potentials with tailored geometries. Varying the excitonic density, we will then reveal that ultra-cold exciton gases evolve from the superfluid to the Mott insulating regime.

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