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arXiv · 2009.07566

Quasi-condensation of bilayer excitons in a periodic potential

Camille Lagoin·Stephan Suffit·Kenneth West·Kirk Baldwin·Loren Pfeiffer·Markus Holzmann·Francois Dubin
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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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Camille Lagoin, Stephan Suffit, Kenneth West, Kirk Baldwin, Loren Pfeiffer, Markus Holzmann, Francois Dubin. 2020-09-16. Quasi-condensation of bilayer excitons in a periodic potential. https://doi.org/10.1103/physrevlett.126.067404

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