Magnetotransport in type‐III Hg1−xZnxTe‐CdTe superlattices
| Autor: | J. P. Faurie, X. Chu, S. B. Rafol |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Electron mobility
Magnetoresistance Condensed matter physics Chemistry Superlattice General Physics and Astronomy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Shubnikov–de Haas effect Magnetic field Condensed Matter::Materials Science Effective mass (solid-state physics) Hall effect Condensed Matter::Strongly Correlated Electrons Charge carrier |
| Zdroj: | Journal of Applied Physics. 74:1151-1160 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | Magnetotransport experiments on several n‐type Hg1−xZnxTe‐CdTe superlattices reveal the existence of two species of charge carriers which dominate in low and in high magnetic fields. These superlattices exhibit low‐magnetic‐field Shubnikov–de Haas oscillations and Hall plateaus in one superlattice. They also exhibit a metal‐insulator transition due to an energy gap induced by the high magnetic fields. The induced energy gap is estimated using a simplified parallel‐conduction model. When most of the electrons in the superlattices have been magnetically frozen out, a second species of charge carriers starts dominating the charge transport. The second species of charge carriers shows large amplitude Shubnikov–de Haas oscillations and Hall plateaus. The standard determination of effective masses, mobilities, and carrier densities from the Shubnikov–de Haas oscillations in low and in high magnetic fields also confirms the presence of two species of charge carriers of different origin. It is proposed that the h... |
| Databáze: | OpenAIRE |
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