Vertical transport in type-II heterojunctions with InAs/GaSb/AlSb composite quantum wells in a high magnetic field
| Autor: | Eduard Hulicius, M. O. Safonchik, Alice Hospodková, R. V. Parfeniev, L. V. Danilov, V. A. Berezovets, Jiří Pangrác, M. P. Mikhailova |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Quantum limit Heterojunction Landau quantization Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Magnetic field 0103 physical sciences 010306 general physics Electronic band structure Quantum well Quantum tunnelling |
| Zdroj: | Semiconductors. 51:1343-1349 |
| ISSN: | 1090-6479 1063-7826 |
| DOI: | 10.1134/s1063782617100141 |
| Popis: | Vertical transport in type-II heterojunctions with a two-barrier AlSb/InAs/GaSb/AlSb quantum well (QW) grown by MOVPE on an n-InAs (100) substrate is investigated in quantizing magnetic fields up to B = 14 T at low temperatures T = 1.5 and 4.2 K. The width of the QWs is selected from the formation condition of the inverted band structure. Shubnikov–de Haas oscillations are measured at two orientations of the magnetic field (perpendicular and parallel) relative to the structure plane. It is established that conduction in the structure under study is occurs via both three-dimensional (3D) substrate electrons and two-dimensional 2D QW electrons under quantum limit conditions for bulk electrons (B > 5 T). The electron concentrations in the substrate and InAs QW are determined. The g-factor for 3D carriers is determined by spin splitting of the zero Landau level. It is shown that the conductance maxima in a magnetic field perpendicular to the structure plane and parallel to the current across the structure in fields B > 9 T correspond to the resonant tunneling of 3D electrons from the emitter substrate into the InAs QW through the 2D electron states of the Landau levels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|