Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4926731
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Funding
- National Basic Research Program of China [2014CB932500, 2015CB921000]
- National Science Foundation of China [51222202, 51410305074, 51472215, 61427901]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
- Fundamental Research Funds for the Central Universities [2014XZZX003-07]
- National Key Technology Support Program [2012BAB19B00]
- National Key Scientific Instrument and Equipment Development Project [2013YQ470781]
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In this study, 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 A(g)(2) 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. (C) 2015 AIP Publishing LLC.
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