Magnetotransport properties of the two-dimensional electron gas in AlzGa(1-z)N/GaN heterostructures under illumination

摘要：

Magnetotransport properties of the two-dimensional electron gas (2DEG) in the triangular quantum well at AlxGa(1-x)N/GaN heterointerfaces have been investigated by means of temperature dependent Shubnikov-de Haas (SdH) measurements at low temperatures and high magnetic fields under illumination. After the illumination of the heterostructures,the 2DEG concentration increases and the SdH oscillation amplitudes are enhanced when there is no additional subband occupation. As the second subband becomes to be populated,the electron mobility decreases for the intersubband scattering and the 2DEG concentration of the first subband deceases. We suggest that the illumination decreases the electric field and weakens the quantum confinement of the triangular quantum well at AlxGa(1-x)N/GaN heterointerfaces.

作者: Ning Tang Jun-Hao Chu Bo Shen Kui Han Zhi-Jian Yang Zhi-Xin Qin Guo-Yi Zhang Tie Lin Wen-Zheng Zhou Li-Yan Shang

作者单位: State Key Laboratory of Artificial Microstructure and Mesoscopic Physics,School of Physics,Peking Un National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of

会议类型: 国际会议

会议名称: 9th International Conference on Solid-State and Integrated-Circuit Technology(第9届固态和集成电路国际会议)

会议地点: 北京

会议语种:英文

页码: 1122-1125

在线出版日期: 2008-10-20（万方平台首次上网日期，不代表论文的发表时间）