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arXiv · 1510.06518

Quantum Hall Effect in Ultrahigh Mobility Two-dimensional Hole Gas of Black Phosphorus

Gen Long·Denis Maryenko·Junying Shen·Shuigang Xu·Jianqiang Hou·Zefei Wu·Wing Ki Wong·Tianyi Han·Jiangxiazi Lin·Yuan Cai·Rolf Lortz·Ning Wang
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Abstract

We demonstrate that a field effect transistor (FET) made of few layer black phosphorus (BP) encapsulated in hexagonal boron nitride (h-BN) in vacuum, exhibts the room temperature hole mobility of 5200 $cm^2/Vs$ being limited just by the phonon scattering. At cryogenic tempeature the FET mobility increases up to 45,000 $cm^2/Vs$, which is eight times higher compared with the mobility obtained in earlier reports. The unprecedentedly clean h-BN/BP/h-BN heterostructure exhibits Shubnikov-de Haas oscillations and quantum Hall effect with Landau level (LL) filling factors down to v=2 in conventional laboratory magnetic fields. Moreover, carrier density independent effective mass m=0.26 m_0 is measured, and Lande g-factor g=2.47 is reported. Furthermore, an indication for a distinct hole transport behavior with up and down spin orientation is found.

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Gen Long, Denis Maryenko, Junying Shen, Shuigang Xu, Jianqiang Hou, Zefei Wu, Wing Ki Wong, Tianyi Han, Jiangxiazi Lin, Yuan Cai, Rolf Lortz, Ning Wang. 2016-05-12. Quantum Hall Effect in Ultrahigh Mobility Two-dimensional Hole Gas of Black Phosphorus. https://doi.org/10.1021/acs.nanolett.6b03951

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