Effect of Small-Angle Scattering on the Integer Quantum Hall Plateau
SHU Qiang1, LIN Yao-Wang1,2, XING Xiao-Dong1, YAO Jiang-Hong1, PI Biao1, SHU Yong-Chun1, WANG Zhan-Guo1,2, XU Jing-Jun1
1The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials (Ministry of Education), Nankai University, Tianjin 300457
2Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
Effect of Small-Angle Scattering on the Integer Quantum Hall Plateau
SHU Qiang1;LIN Yao-Wang1,2;XING Xiao-Dong1;YAO Jiang-Hong1;PI Biao1;SHU Yong-Chun1;WANG Zhan-Guo1,2;XU Jing-Jun1
1The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials (Ministry of Education), Nankai University, Tianjin 300457
2Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
Abstract： A GaAs/AlGaAs two-dimensional electron gas (2DEG) structure with the high mobility of mu2K=1.78×106cm1/Vs has been studied by low-temperature Hall and Shubnikov de Hass (SdH) measurements. Quantum lifetimes related to all-angle scattering events reduced from 0.64ps to 0.52ps after illuminating by Dingle plots, and transport lifetimes related to large-angle scattering events increasing from 42.3ps to 67.8ps. These results show that small-angle scattering events become stronger. It is clear that small-angle scattering events can cause the variation of the widths of the quantum Hall plateaus.
SHU Qiang;LIN Yao-Wang;XING Xiao-Dong;YAO Jiang-Hong;PI Biao;SHU Yong-Chun;WANG Zhan-Guo;XU Jing-Jun. Effect of Small-Angle Scattering on the Integer Quantum Hall Plateau[J]. 中国物理快报, 2006, 23(2): 436-438.
SHU Qiang, LIN Yao-Wang, XING Xiao-Dong, YAO Jiang-Hong, PI Biao, SHU Yong-Chun, WANG Zhan-Guo, XU Jing-Jun. Effect of Small-Angle Scattering on the Integer Quantum Hall Plateau. Chin. Phys. Lett., 2006, 23(2): 436-438.
2006, Vol. 23 
