%0 Journal Article %T Quasi-condensation of bilayer excitons in a periodic potential %+ Institut des Nanosciences de Paris (INSP) %+ Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)) %+ Princeton Institute for the Science and Technology of Materials %+ Laboratoire de physique et modélisation des milieux condensés (LPM2C ) %A Lagoin, Camille %A Suffit, Stephan %A West, Kenneth %A Baldwin, Kirk %A Pfeiffer, Loren %A Holzmann, Markus %A Dubin, Francois %Z 5 pages 4 figures %< avec comité de lecture %@ 0031-9007 %J Physical Review Letters %I American Physical Society %V 126 %N 6 %P 067404 %8 2021 %D 2021 %Z 2009.07566 %R 10.1103/PhysRevLett.126.067404 %Z Physics [physics]/Condensed Matter [cond-mat]Journal articles %X 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. %G English %2 https://cnrs.hal.science/hal-03368562/document %2 https://cnrs.hal.science/hal-03368562/file/PhysRevLett.126.067404.pdf %L hal-03368562 %U https://cnrs.hal.science/hal-03368562 %~ UGA %~ CNRS %~ INSP %~ ALLINSP %~ LPMMC %~ SORBONNE-UNIVERSITE %~ SORBONNE-UNIV %~ SU-SCIENCES %~ UNIV-PARIS %~ UNIVERSITE-PARIS %~ UP-SCIENCES %~ TEST-HALCNRS %~ UGA-EPE %~ MPQ %~ SU-TI %~ ALLIANCE-SU