Observation of an Even-Odd Asymmetric Transport in High Landau Levels

Magnetotransport experiments including tilt fields are performed on ultrahigh mobility L-shaped Hall-bar samples of GaAs/AlGaAs quantum wells. The low-temperature longitudinal resistivity （ρxx） data demonstrate that a striking even-odd asymmetric transport exists along the [110] direction at half fi...

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Published inChinese physics letters Vol. 34; no. 3; pp. 112 - 116
Main Author 刘广同 朱玉莹 王钦 庞远 樊洁 景秀年 姬忠庆 杨昌黎 吕力 杜瑞瑞 L. N. Pfeiffer K. W. West
Format Journal Article
LanguageEnglish
Published 01.03.2017
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Summary:Magnetotransport experiments including tilt fields are performed on ultrahigh mobility L-shaped Hall-bar samples of GaAs/AlGaAs quantum wells. The low-temperature longitudinal resistivity （ρxx） data demonstrate that a striking even-odd asymmetric transport exists along the [110] direction at half filling in N ≥ 2 high Landau levels. Although the origin for the peculiar even-odd asymmetry remains unclear, we propose that the coupling strength between electrons within the same Landau level and between the neighboring two Landau levels should be considered in future studies. The tilt field data show that the in-plane field can suppress the formation of both bubble and stripe phases.
Bibliography:Magnetotransport experiments including tilt fields are performed on ultrahigh mobility L-shaped Hall-bar samples of GaAs/AlGaAs quantum wells. The low-temperature longitudinal resistivity （ρxx） data demonstrate that a striking even-odd asymmetric transport exists along the [110] direction at half filling in N ≥ 2 high Landau levels. Although the origin for the peculiar even-odd asymmetry remains unclear, we propose that the coupling strength between electrons within the same Landau level and between the neighboring two Landau levels should be considered in future studies. The tilt field data show that the in-plane field can suppress the formation of both bubble and stripe phases.
11-1959/O4
Guang-Tong Liu1, Yu-Ying Zhu1, Qin Wang1, Yuan Pang1, Jie Fan1, Xiu-Nian Jing1,2 Zhong-Qing Ji1, Chang-Li Yang1,2, Li Lu1,2, Rui-Rui Du2,3, L. N. Pfeiffer4, K. W. West4 （ 1Daniel Chee Tsui Laboratory, Beijing National Laboratory l＂or Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 2 Collaborative Innovation Center of Quantum Matter, Beijing 100871 3 International Center for Quantum Materials, Peking University, Beijing 100871 4Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/34/3/037301