Novel superlattice in a selectively doped wide parabolic quantum well with a modulated potential
- 12 November 1990
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 57 (20) , 2130-2132
- https://doi.org/10.1063/1.103920
Abstract
We report the realization of a novel superlattice which contains a high mobility (≂ 1.1×105 cm2/V s at 4 K) degenerate electron system. The structure consists of a wide, undoped AlxGa1−xAs well bounded by undoped (spacer) and doped layers of AlyGa1−yAs (y≳x) on both sides. The alloy composition in the well (x) is graded in such a way as to result in a parabolic potential with an additional sinusoidal modulation superimposed on it. Once transferred into this well, the electrons screen the parabolic potential and an electron system with a modulated charge density is obtained. We present self‐consistent quantum mechanical calculations of the electronic system, and report our characterization of the structure by secondary‐ion mass spectrometry and magnetotransport measurements.Keywords
This publication has 11 references indexed in Scilit:
- Magnetic-field-driven destruction of quantum Hall states in a double quantum wellPhysical Review Letters, 1990
- Collective cyclotron resonance in a quasi-three-dimensional electron gasPhysical Review B, 1989
- High quality electron system with variable electron layer thickness in a parabolic quantum wellApplied Physics Letters, 1989
- Secondary-ion mass spectrometry study of the migration of Si in planar-doped GaAs and Al0.25Ga0.75AsApplied Physics Letters, 1989
- Energy spectrum of a layered system in a strong magnetic fieldPhysical Review B, 1989
- Remotely-doped graded potential well structuresSuperlattices and Microstructures, 1988
- Staging transitions in multiple-quantum-well systemsPhysical Review B, 1988
- Fractional Quantum Hall Effect at Half-Filled Landau Level in a Multiple-Layer Electron SystemPhysical Review Letters, 1987
- Superlattice magnetoroton bandsPhysical Review Letters, 1987
- Quantization of the Hall effect in an anisotropic three-dimensional electronic systemPhysical Review Letters, 1986