Excitonic Bose Polarons in Electron-Hole Bilayers.

Autor:	Szwed EA; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Vermilyea B; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Choksy DJ; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Zhou Z; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Fogler MM; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Butov LV; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Efimkin DK; School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia., Baldwin KW; Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, United States., Pfeiffer L; Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, United States.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2024 Oct 23; Vol. 24 (42), pp. 13219-13223. Date of Electronic Publication: 2024 Oct 14.
DOI:	10.1021/acs.nanolett.4c03288
Abstrakt:	Bose polarons are mobile particles of one kind dressed by excitations of the surrounding degenerate Bose gas of particles of another kind. These many-body objects have been realized in ultracold atomic gases and become a subject of intensive studies. In this work, we show that excitons in electron-hole bilayers offer new opportunities for exploring polarons in strongly interacting, highly tunable bosonic systems. We found that Bose polarons are formed by spatially direct excitons immersed in degenerate Bose gases of spatially indirect excitons (IXs). We detected both attractive and repulsive Bose polarons by measuring photoluminescence excitation spectra. We controlled the density of IX Bose gas by optical excitation and observed an enhancement of the energy splitting between attractive and repulsive Bose polarons with increasing IX density, in agreement with our theoretical calculations.
Databáze:	MEDLINE
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