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Fermi edge singularity in photoluminescence excitation spectra of neutral ultracold electron-hole system

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Abstract

We observed a strong enhancement of spatially direct absorption at the Fermi energy of ultracold electron-hole system in separated electron and hole layers, evidencing Fermi-energy excitons. Absorption was probed by photoluminescence excitation spectroscopy.

© 2023 The Author(s)

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