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Helical-edge transport near ν = 0 of monolayer graphene
Current Applied Physics ( IF 2.4 ) Pub Date : 2021-04-16 , DOI: 10.1016/j.cap.2021.04.001 Sung Ju Hong , Christopher Belke , Johannes C. Rode , Benedikt Brechtken , Rolf J. Haug
中文翻译:
单层石墨烯ν = 0附近的螺旋边缘传输
更新日期:2021-04-16
Current Applied Physics ( IF 2.4 ) Pub Date : 2021-04-16 , DOI: 10.1016/j.cap.2021.04.001 Sung Ju Hong , Christopher Belke , Johannes C. Rode , Benedikt Brechtken , Rolf J. Haug
The complex nature of filling factor ν = 0 of monolayer graphene is studied in magnetotransport experiments. As a function of perpendicular magnetic field a metal-insulator transition is observed, which is attributed to disorder-induced Landau level broadening in the canted antiferromagnetic phase. In the metallic regime a separation of the zeroth Landau level appears and signs of the quantum spin Hall effect are seen near ν = 0. In addition to local transport, nonlocal transport experiments show results being consistent with helical edge transport.
中文翻译:
单层石墨烯ν = 0附近的螺旋边缘传输
在磁输运实验中研究了单层石墨烯填充因子ν = 0的复杂性质。作为垂直磁场的函数,观察到金属-绝缘体跃迁,这归因于在倾斜的反铁磁相中由无序引起的朗道能级展宽。在金属状态下,出现了第零朗道能级的分离,并且在ν = 0附近看到了量子自旋霍尔效应的征兆。除了局部输运,非局部输运实验还显示出与螺旋边缘输运相一致的结果。