Comparative Study of the Two-Dimensional Plasma Excitations in the Heterostructures ZnO/MgZnO, AlAs/AlGaAs, and GaAs/AlGaAs

The plasma oscillations in new advanced two-dimensional electron systems (2DESs) based on the heterostructures ZnO/MgZnO, AlAs/AlGaAs, and GaAs/AlGaAs are studied and compared. The relaxation times and the effective masses in samples with various electron densities in these 2DESs are found by microw...

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Veröffentlicht in:	Journal of experimental and theoretical physics 2020-04, Vol.130 (4), p.594-601
Hauptverfasser:	Khisameeva, A. R., Shchepetilnikov, A. V., Muravev, V. M., Nefyodov, Yu. A., Kukushkin, I. V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum gallium arsenides Classical and Quantum Gravitation Comparative analysis Comparative studies Electric waves Electromagnetic radiation Electromagnetic waves Electronic Properties of Solid Electrons Elementary Particles Gallium arsenide Heterostructures Microwave plasmas Particle and Nuclear Physics Physics Physics and Astronomy Plasma Plasma oscillations Plasma spectra Quantum Field Theory Quantum wells Relativity Theory Solid State Physics Spectroscopy Valleys Zinc oxide
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Beschreibung
Zusammenfassung:	The plasma oscillations in new advanced two-dimensional electron systems (2DESs) based on the heterostructures ZnO/MgZnO, AlAs/AlGaAs, and GaAs/AlGaAs are studied and compared. The relaxation times and the effective masses in samples with various electron densities in these 2DESs are found by microwave plasma spectroscopy. The specific features of the plasma oscillations in the AlAs/AlGaAs quantum wells that are induced by the filling of several valleys with electrons are revealed. The possibility of adjusting a plasmon spectrum via changing the electron concentrations in valleys is demonstrated.
ISSN:	1063-7761 1090-6509
DOI:	10.1134/S1063776120020053