Generalized Mott transition observed in Bose-polaron absorption

ORAL

Abstract

Cold neutral electron-hole systems in electron-hole bilayers in GaAs heterostructure were studied. The attractive and repulsive Bose-polarons in the spatially direct absorption (photoluminescence excitation spectra) were found. The Bose-polarons are formed by spatially direct excitons (DXs) dressed by excitations of the surrounding Bose gas of spatially indirect excitons (IXs) [E.A. Szwed et. al., Nano Lett. (2024) https://doi.org/10.1021/acs.nanolett.4c03288]. We measured how the polaron peaks vanish with increasing temperature and IX density and analyzed the generalized Mott transition in Bose-polarons.

*The PLE studies were supported by DOE Award DE-FG02-07ER46449, the PL studies by NSF Grant 1905478, and the heterostructure growth by Gordon and Betty Moore Foundation Grant GBMF9615 and NSF grant DMR 2011750.

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Publication: E.A. Szwed et. al., Nano Lett. (2024) https://doi.org/10.1021/acs.nanolett.4c03288

Presenters

  • Erik A Szwed

    • University of California, San Diego

Authors

  • Erik A Szwed

    • University of California, San Diego

  • Brian Vermilyea

    • University of California, San Diego

  • Darius J Choksy

    • Quantum Design Inc.

  • Zhiwen Zhou

    • University of California, San Diego

  • Michael M Fogler

    • University of California, San Diego

  • Leonid V Butov

    • University of California, San Diego

  • Dmitry K Efimkin

    • Monash University

  • Kirk W Baldwin

    • Princeton University

  • Loren N Pfeiffer

    • Princeton University