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• W2578652605 abstract "Recently we reported on the condensation of cold, electrostatically trapped dipolar excitons in GaAs bilayer heterostructure into a new, dense and dark collective phase. Here we analyze and discuss in detail the experimental findings and the emerging evident properties of this collective liquid-like phase. We show that the phase transition is characterized by a sharp increase of the number of non-emitting dipoles, by a clear contraction of the fluid spatial extent into the bottom of the parabolic-like trap, and by spectral narrowing. We extract the total density of the condensed phase which we find to be consistent with the expected density regime of a quantum liquid. We show that there are clear critical temperature and excitation power onsets for the phase transition and that as the power further increases above the critical power, the strong darkening is reduced down until no clear darkening is observed. At this point another transition appears which we interpret as a transition to a strongly repulsive yet correlated $e$-$h$ plasma. Based on the experimental findings, we suggest that the physical mechanism that may be responsible for the transition is a dynamical final-state stimulation of the dipolar excitons to their dark spin states, which have a long lifetime and thus support the observed sharp increase in density. Further experiments and modeling will hopefully be able to unambiguously identify the physical mechanism behind these recent observations." @default.
• W2578652605 created "2017-01-26" @default.
• W2578652605 creator A5049531415 @default.
• W2578652605 creator A5056897690 @default.
• W2578652605 creator A5071257491 @default.
• W2578652605 date "2017-08-01" @default.
• W2578652605 modified "2023-09-26" @default.
• W2578652605 title "Condensation to a strongly correlated dark fluid of two dimensional dipolar excitons" @default.
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• W2578652605 doi "https://doi.org/10.1016/j.spmi.2017.01.022" @default.
• W2578652605 hasPublicationYear "2017" @default.
• W2578652605 type Work @default.
• W2578652605 sameAs 2578652605 @default.

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