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High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus

Author

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  • Jingsi Qiao

    (Renmin University of China
    Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China)

  • Xianghua Kong

    (Renmin University of China
    Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China)

  • Zhi-Xin Hu

    (Renmin University of China
    Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China)

  • Feng Yang

    (Renmin University of China
    Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China
    College of Physics and Electronic Engineering, Institute of Solid State Physics, Sichuan Normal University)

  • Wei Ji

    (Renmin University of China
    Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China)

Abstract

Two-dimensional crystals are emerging materials for nanoelectronics. Development of the field requires candidate systems with both a high carrier mobility and, in contrast to graphene, a sufficiently large electronic bandgap. Here we present a detailed theoretical investigation of the atomic and electronic structure of few-layer black phosphorus (BP) to predict its electrical and optical properties. This system has a direct bandgap, tunable from 1.51 eV for a monolayer to 0.59 eV for a five-layer sample. We predict that the mobilities are hole-dominated, rather high and highly anisotropic. The monolayer is exceptional in having an extremely high hole mobility (of order 10,000 cm2 V−1 s−1) and anomalous elastic properties which reverse the anisotropy. Light absorption spectra indicate linear dichroism between perpendicular in-plane directions, which allows optical determination of the crystalline orientation and optical activation of the anisotropic transport properties. These results make few-layer BP a promising candidate for future electronics.

Suggested Citation

  • Jingsi Qiao & Xianghua Kong & Zhi-Xin Hu & Feng Yang & Wei Ji, 2014. "High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5475
    DOI: 10.1038/ncomms5475
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    1. Wenhao Ran & Zhihui Ren & Pan Wang & Yongxu Yan & Kai Zhao & Linlin Li & Zhexin Li & Lili Wang & Juehan Yang & Zhongming Wei & Zheng Lou & Guozhen Shen, 2021. "Integrated polarization-sensitive amplification system for digital information transmission," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
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    6. Shulin Zhong & Xuanlin Zhang & Jian Gou & Lan Chen & Su-Huai Wei & Shengyuan A. Yang & Yunhao Lu, 2024. "Lone-pair activated ferroelectricity and stable charged domain wall in Bi monolayer," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
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