Magnetic-field-induced transitions between minibands in GaAs/AlxGa1−xAs superlattices
✍ Scribed by V. F. Sapega; D. N. Mirlin; T. Ruf; M. Cardona; W. Winter; K. Eberl
- Book ID
- 110126634
- Publisher
- Springer
- Year
- 2001
- Tongue
- English
- Weight
- 58 KB
- Volume
- 35
- Category
- Article
- ISSN
- 1063-7826
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We have systematically measured the electroreflectance spectra of a GaAs (7.0 nm)/Al 0.1 Ga 0.9 As (3.5 nm) superlattice at various electric fields to investigate Franz-Keldysh (FK) oscillations. In the low-field regime, we clearly observe the FK oscillations toward the low-energy side of the M 1 cr
We report on the observation of the Franz-Keldysh oscillations associated with the secondelectron and heavy-hole minibands, in which the second-electron miniband lies above the barrier potential, in a GaAs(7.0 nm)/Al 0.1 Ga 0.9 As (3.5 nm) superlattice by using electroreflectance spectroscopy. The r