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Journal Articles Physical Review Letters Year : 2021

Quasi-condensation of bilayer excitons in a periodic potential

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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.
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Dates and versions

hal-03368562 , version 1 (06-10-2021)

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Camille Lagoin, Stephan Suffit, Kenneth West, Kirk Baldwin, Loren Pfeiffer, et al.. Quasi-condensation of bilayer excitons in a periodic potential. Physical Review Letters, 2021, 126 (6), pp.067404. ⟨10.1103/PhysRevLett.126.067404⟩. ⟨hal-03368562⟩
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