Quasi-condensation of bilayer excitons in a periodic potential

Abstract

We study two-dimensional excitons confined in a lattice potential, for high fillings of the lattice sites. We show that a quasi-condensate is possibly formed for small values of the lattice depth, but for larger ones the critical phase-space density for quasi-condensation rapidly exceeds our experimental reach, due to the increase of the excitons effective mass. On the other hand, in the regime of a deep lattice potential where excitons are strongly localised at the lattice sites, we show that an array of phase-independent quasi-condensates, different from a Mott insulating phase, is realised.

5 pages 4 figures

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Observation of Moiré Excitons in WSe2/WS2 Heterostructure Superlattices
• Analysis of the exciton-exciton interaction in semiconductor quantum wells
• Collection of indirect excitons in a diamond-shaped electrostatic trap
• Observation of Algebraic Time Order for Two-Dimensional Dipolar Excitons
• A Microscopic Lattice for Two-dimensional Dipolar Excitons

Cited by in corpus (6)

• Spontaneous coherence in spatially extended photonic systems: Non-Equilibrium Bose-Einstein condensation
• Moiré-Bose-Hubbard model for interlayer excitons in twisted transition metal dichalcogenide heterostructures
• Extended Bose-Hubbard model with dipolar excitons
• Mott insulator of strongly interacting two-dimensional excitons
• Stationary waves in a superfluid gas of electron-hole pairs in bilayers
• Capacitance and conductance oscillations from electron tunneling into high energy levels of a quantum well in a p-i-n diode