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25 April 2024

» arxiv » 1509.5953

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Probing the anisotropic behaviors of black phosphorus by transmission electron microscope, angular-dependent Raman spectra and electronic transports measurements
Wanglin Lu ; Xiaomeng Ma ; Zhen Fei ; Jianguang Zhou ; Zhiyong Zhang ; Chuanhong Jin ; Ze Zhang ;
Date:	20 Sep 2015
Abstract:	In this work, we correlated the angular dependence of the Raman response of black phosphorus to its crystallographic orientation by using transmission electron microscopy and Raman spectroscopy. It was found that the intensity of the A2g mode reached a maximum when the polarization direction of the incident light was parallel to the zigzag crystallographic orientation. Notably, it was further confirmed that the zigzag crystallographic direction exhibited superior conductance and carrier mobility. Because of the lattice extension along the armchair direction, an intensification of the anisotropic Raman response was observed. This work provides direct evidence of the correlation between anisotropic properties and crystallographic direction and represents a turning point in the discussion of the angular-dependent electronic properties of black phosphorus.
Source:	arXiv, 1509.5953
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