| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Exchange Enhancement of Spin-Splitting in AlxGa1−xN/GaN Heterostructures in Tilted Magnetic Fields |
| TANG Ning**, HAN Kui, LU Fang-Chao, DUAN Jun-Xi, XU Fu-Jun, SHEN Bo
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State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871
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| Cite this article: |
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TANG Ning, HAN Kui, LU Fang-Chao et al 2011 Chin. Phys. Lett. 28 037103 |
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Abstract 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.
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| Keywords:
71.18.+y
72.20.My
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Received: 18 September 2010
Published: 28 February 2011
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| PACS: |
71.18.+y
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(Fermi surface: calculations and measurements; effective mass, g factor)
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72.20.My
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(Galvanomagnetic and other magnetotransport effects)
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