Abstract
We fabricated semiconductor superlattices of GaAs1-xSbx in which the chemical composition x varies sinusoidally along the direction of growth. This was accomplished by means of a novel molecular-beam epitaxy growth technique, in which the periodic modulation is achieved by substrate rotation in the presence of non-uniform flux distributions of elemental sources, rather than by shutter openings and closings. The sinusoidal nature of the compositional profiles of GaAs1-xSbx was inferred from the presence of only a single superlattice Fourier component in the X-ray diffraction spectra observed on these novel structures. Superlattice formation by this method is additionally supported by systematic photoluminescence data.
Original language | English |
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Pages (from-to) | 1143-1146 |
Number of pages | 4 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 13 |
Issue number | 2-4 |
DOIs | |
Publication status | Published - 2002 Mar |
Bibliographical note
Funding Information:This work was supported by the US Department of Energy Grant 97ER45644.
Keywords
- GaAsSb
- Photoluminescence
- Superlattices
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics