Long wavelength Infrared Detection, Bands Structure and effective mass in InAs/GaSb Nanostructure Superlattice
| Autor: | Abdelhakim Nafidi, Ali Khalal, Samir Melkoud, Abderrazak Boutramine, Merieme Benaadad |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
lcsh:GE1-350 Materials science Band gap Scattering Superlattice Fermi level Fermi surface 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Semimetal symbols.namesake Effective mass (solid-state physics) 0103 physical sciences symbols Density of states 0210 nano-technology lcsh:Environmental sciences |
| Zdroj: | E3S Web of Conferences, Vol 229, p 01036 (2021) |
| ISSN: | 2267-1242 |
| Popis: | We have investigated in the bands structure and the effective mass, respectively, along the growth axis and in the plane of InAs (d1=48.5Å)/GaSb(d2=21.5Å) type II superlattice (SL), performed in the envelop function formalism. We studied the semiconductor to semimetal transition and the evolutions of the optical band gap, Eg(Γ), as a function of d1, the valence band offset Λ and the temperature. In the range of 4.2–300 K, the corresponding cutoff wavelength ranging from 7.9 to 12.6 µm, which demonstrates that this sample can be used as a long wavelength infrared detector. The position of the Fermi level, EF = 512 meV, and the computed density of state indicates that this sample is a quasi-two-dimensional system and exhibits n type conductivity. Further, we calculated the transport scattering time and the velocity of electrons on the Fermi surface. These results were compared and discussed with the available data in the literature. |
| Databáze: | OpenAIRE |
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