Origin of split peaks in the oscillatory magnetoresistance in AlxGa1-xN/GaN heterostructures

被引:5
|
作者
Tang, N. [1 ]
Shen, B.
Han, K.
Yang, Z. J.
Xu, K.
Zhang, G. Y.
Lin, T.
Zhu, B.
Zhou, W. Z.
Shang, L. Y.
Guo, S. L.
Chu, J. H.
机构
[1] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1063/1.2349561
中图分类号
O59 [应用物理学];
学科分类号
摘要
The oscillatory magnetoresistance of the two-dimensional electron gas (2DEG) in AlxGa1-xN/GaN heterostructures has been studied by means of magnetotransport measurements at low temperatures and high magnetic fields. The split peaks of the Shubnikov-de Haas oscillations are observed at high magnetic fields, which are attributed to the spin splitting of the 2DEG. It is found that the spin splitting energy becomes smaller with an increase in magnetic field, indicating that the Zeeman spin splitting is not dominant at measured magnetic field range. Within this magnetic field range, the zero-field spin splitting, as well as Zeeman spin splitting, affects the split peaks in the oscillatory magnetoresistance of the 2DEG in AlxGa1-xN/GaN heterostructures.
引用
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页数:3
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