Current oscillations at high electrical fields in the two-dimensional electron gas in GaAs/AlGaAs heterostructures

In the two-dimensional electron gas (2DEG) of GaAs/AlGaAs heterostructures, we observe a new type of oscillation in the current at electric fields above 0.8 kV/cm. These oscillations have two characteristic frequencies, around 200 MHz and 2.5 GHz. We show that these oscillations arise from propertie...

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Veröffentlicht in:	Applied physics letters 1989-06, Vol.54 (26), p.2668-2670
Hauptverfasser:	HENDRIKS, P, STARING, A. A. M, VAN WELZENIS, R. G, WOLTER, J. H, PROST, W, HEIME, K, SCHLAPP, W, WEIMANN, G
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in interface structures Exact sciences and technology Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	In the two-dimensional electron gas (2DEG) of GaAs/AlGaAs heterostructures, we observe a new type of oscillation in the current at electric fields above 0.8 kV/cm. These oscillations have two characteristic frequencies, around 200 MHz and 2.5 GHz. We show that these oscillations arise from properties of the 2DEG and depend on both electric field and magnetic fields. They disappear abruptly when magnetic fields above 0.5 T are applied.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.101030