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Evolution of energy levels of a GaAs/AlGaAs superlattice under the influence of a strong magnetic field

Entstehung von Energieniveaus eines GaAs/AlGaAs Übergitters unter dem Einfluß eines starken magnetischen Feldes
 
: Bauer, T.; Hummel, A.; Roskos, H.; Köhler, K.

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Physica. E 7 (2000), S.289-293
ISSN: 1386-9477
Englisch
Zeitschriftenaufsatz
Fraunhofer IAF ()
III-V semiconductors; III-V Halbleiter; superlattices; Übergitter; optical measurements; optische Messungen

Abstract
We present photocurrent spectra of the Wannier-Stark ladder of a GaAs/AlGaAs superlattice in a magnetic field up to 9 T and oriented along the growth direction of the superlattice. The Landau and Wannier-Stark quantization directions are perpendicular to each other. The salient observation is the evolution of Landau fans for the different Wannier-Stark transitions with the Landau fan assigned to the spatially direct Wannier-Stark-ladder transitions being very pronounced quite in contrast to the Landau fans for the spatially indirect Wannier-Stark transitions which are weak.

: http://publica.fraunhofer.de/dokumente/N-1258.html