摘要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.
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.
(Galvanomagnetic and other magnetotransport effects)
引用本文:
TANG Ning**;HAN Kui;LU Fang-Chao;DUAN Jun-Xi;XU Fu-Jun;SHEN Bo
. Exchange Enhancement of Spin-Splitting in AlxGa1−xN/GaN Heterostructures in Tilted Magnetic Fields[J]. 中国物理快报, 2011, 28(3): 37103-037103.
TANG Ning**, HAN Kui, LU Fang-Chao, DUAN Jun-Xi, XU Fu-Jun, SHEN Bo
. Exchange Enhancement of Spin-Splitting in AlxGa1−xN/GaN Heterostructures in Tilted Magnetic Fields. Chin. Phys. Lett., 2011, 28(3): 37103-037103.
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2011, Vol. 28 
