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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Exchange Enhancement of Spin-Splitting in AlxGa1-xN/GaN Heterostructures in Tilted Magnetic Fields

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Alx Ga1-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 Alx Ga1-xN/GaN heterointerface.

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《中国物理快报：英文版》 |2011年第3期|188-190|共3页
作者
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;

State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University,Beijing,100871;

State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University,Beijing,100871;

State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University,Beijing,100871;

State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University,Beijing,100871;

State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University,Beijing,100871;

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Exchange Enhancement of Spin-Splitting in AlxGa1-xN/GaN Heterostructures in Tilted Magnetic Fields

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