| Magnetointersubband Oscillations of the Two-Dimensional Electron Gas in AlxGa1-xN／GaN Heterostructures |
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| 引用本文： | 蒋春萍 杨富华 郑厚植 仇志军 桂永胜 郭少令 褚君浩 沈波 郑有Dou.Magnetointersubband Oscillations of the Two-Dimensional Electron Gas in AlxGa1-xN／GaN Heterostructures[J].中国物理快报,2004,21(5):915-918. |
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| 作者姓名： | 蒋春萍 杨富华 郑厚植 仇志军 桂永胜 郭少令 褚君浩 沈波 郑有Dou |
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| 作者单位： | [1]NationalLaboratoryforSuperlatticesandMicrostructures,InstituteofSemiconductors,ChineseAcademyofSciences,POBox912,Beijing100083 [2]NationalLaboratoryforInfraredPhysics,ShanghaiInstituteofTechnicalPhysics,ChineseAcademyofSciences,Shanghai200083 [3]NationalLaboratoryofSolidStateMicrostructuresandDepartmentofPhysics,NanjingUniversity,Nanjing210093 |
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| 摘 要： | Shubnikov-de Haas (SdH) measurements are performed over a temperature range of 1.5-20 K in Al0.22 Ga0.78N/GaN heterostructures with two subbands occupied. In addition to an intermodulation between two sets of SdH oscillations from the first and second subbands, a beating in oscillatory magnetoresistance at 12K is observed, due to the mixing of the first subband SdH oscillations and ‘magnetointersubband‘ (MIS) oscillations. A phase shift of π between the SdH and MIS oscillations is also clearly identified. Our experimental results, i.e. that the SdH oscillations dominate at low temperature and MIS oscillations dominate at high temperature, fully comply with the expected behaviour of MIS oscillations.
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| 关 键 词： | 二维电子气体 氮化镓异质结 半导体材料 磁致电阻 磁场响应 |
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