Suris tetrons: possible spectroscopic evidence for four-particle optical excitations of the 2D electron gas

Abstract

The excitations of a two-dimensional electron gas in quantum wells with intermediate carrier density (~10^{11} cm^{-2}), i.e., between the exciton-trion- and the Fermi-Sea range, are so far poorly understood. We report on an approach to bridge this gap by a magneto-photoluminescence study of modulation-doped (Cd,Mn)Te quantum well structures. Employing their enhanced spin splitting, we analyzed the characteristic magnetic-field behavior of the individual photoluminescence features. Based on these results and earlier findings by other authors, we present a new approach for understanding the optical transitions at intermediate densities in terms of four-particle excitations, the Suris tetrons, which were up to now only predicted theoretically. All characteristic photoluminescence features are attributed to emission from these quasi-particles when attaining different final states.

12 pages, 3 figures

References in corpus (6)

• The onset of exciton absorption in modulation doped GaAs quantum wells
• Measurement of binding energy of negatively charged excitons in GaAs/AlGaAs quantum wells
• Measuring the spin polarization and Zeeman energy of a spin-polarized electron gas: Comparison between Raman scattering and photoluminescence
• Linear polarization of the photoluminescence of quantum wells
• Magneto-optics of two-dimensional electron gases modified by strong Coulomb interactions in ZnSe quantum wells
• Optical study of electron-electron exchange interaction in CdTe/ZnTe quantum dots

Cited by in corpus (18)

• Fermi polaron-polaritons in charge-tunable atomically thin semiconductors
• Optical properties of charged excitons in two-dimensional semiconductors
• Doping-control of excitons and magnetism in few-layer CrSBr
• Cross-over from trion-hole to exciton-polaron in n-doped semiconductor quantum wells
• Polaron-Polaritons in the Integer and Fractional Quantum Hall Regimes
• Hexcitons and oxcitons in monolayer WSe${}_2$
• Observation of Rydberg moiré excitons
• Autoionization and dressing of excited excitons by free carriers in monolayer WSe2
• Electron recoil effect in electrically tunable MoSe2 monolayers
• Composite excitonic states in doped semiconductors
• Excitons and trions in monolayer semiconductors with correlated electrons
• Optical spin orientation of minority holes in a modulation-doped GaAs/(Ga,Al)As quantum well
• Longitudinal-transverse splitting and fine structure of Fermi polarons in two-dimensional semiconductors
• Electronic excitations stabilised by a degenerate electron gas in semiconductors
• Excitons and trions in CrSBr bilayers
• Component exchange theory of trions
• Energy shifts and broadening of excitonic resonances in electrostatically-doped semiconductors
• Terahertz radiation induced attractive-repulsive Fermi polaron conversion in transition metal dichalcogenide monolayers