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High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus.
Nat Commun 2014; 5:4475NC

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 cm(2) 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.

Authors+Show Affiliations

1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China [3].1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China [3].1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China [3] College of Physics and Electronic Engineering, Institute of Solid State Physics, Sichuan Normal University, Chengdu 610068, China.1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25042376

Citation

Qiao, Jingsi, et al. "High-mobility Transport Anisotropy and Linear Dichroism in Few-layer Black Phosphorus." Nature Communications, vol. 5, 2014, p. 4475.
Qiao J, Kong X, Hu ZX, et al. High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus. Nat Commun. 2014;5:4475.
Qiao, J., Kong, X., Hu, Z. X., Yang, F., & Ji, W. (2014). High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus. Nature Communications, 5, p. 4475. doi:10.1038/ncomms5475.
Qiao J, et al. High-mobility Transport Anisotropy and Linear Dichroism in Few-layer Black Phosphorus. Nat Commun. 2014 Jul 21;5:4475. PubMed PMID: 25042376.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus. AU - Qiao,Jingsi, AU - Kong,Xianghua, AU - Hu,Zhi-Xin, AU - Yang,Feng, AU - Ji,Wei, Y1 - 2014/07/21/ PY - 2014/02/27/received PY - 2014/06/20/accepted PY - 2014/7/22/entrez PY - 2014/7/22/pubmed PY - 2014/7/22/medline SP - 4475 EP - 4475 JF - Nature communications JO - Nat Commun VL - 5 N2 - 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 cm(2) 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. SN - 2041-1723 UR - https://www.unboundmedicine.com/medline/citation/25042376/High_mobility_transport_anisotropy_and_linear_dichroism_in_few_layer_black_phosphorus_ L2 - http://dx.doi.org/10.1038/ncomms5475 DB - PRIME DP - Unbound Medicine ER -