Exchange Enhancement of Spin-Splitting in Al x Ga 1− x N/GaN Heterostructures in Tilted Magnetic Fields
| Autor: | Fang-Chao Lu, Fu-Jun Xu, Kui Han, Ning Tang, Bo Shen, Junxi Duan |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Zeeman effect Condensed matter physics General Physics and Astronomy Heterojunction Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Magnetic field Condensed Matter::Materials Science symbols.namesake Tilt (optics) Electric field symbols Condensed Matter::Strongly Correlated Electrons Fermi gas Anisotropy Maxima |
| Zdroj: | Chinese Physics Letters. 28:037103 |
| ISSN: | 1741-3540 0256-307X |
| Popis: | AlxGa1?xN/GaN heterostructures are investigated by magnetotransport experiments in tilted magnetic fields at low temperatures. The spin-split peaks of the Shubnikov-de Haas (SdH) oscillations are observed at high magnetic fields, which are attributed to the Zeeman spin-splitting of the two-dimensional electron gas at the heterointerface. The exchange enhanced g* of the spin-splitting is investigated by measuring the positions of the pairs of spin-split SdH maxima. Moreover, it is found that g* becomes smaller with the increasing tilt angle, which suggests the anisotropy of g* is due to the strong polarization-induced electric field at the AlxGa1?xN/GaN heterointerface. |
| Databáze: | OpenAIRE |
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