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Raman tensor of layered black arsenic
Author(s) -
Zhu Yanming,
Zheng Wei,
Wang Weiliang,
Zhu Siqi,
Cheng Lu,
Li Linxuan,
Lin Zeguo,
Ding Ying,
Jin Mingge,
Huang Feng
Publication year - 2020
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5922
Subject(s) - raman spectroscopy , anisotropy , arsenic , chemistry , polarizability , raman scattering , molecular physics , phonon , analytical chemistry (journal) , materials science , optics , condensed matter physics , physics , molecule , organic chemistry , chromatography
Due to the similar atom arrangement with black phosphorus, black arsenic also has obvious Raman anisotropy at both the base and cross planes. However, the polarization characteristics of black arsenic have been rarely reported so far with most relevant studies devoted to the base plane. Here, to compensate for the blank of the anisotropy in cross plane, we implemented a systematical angle‐resolved polarized Raman measurement on both planes of layered black arsenic and observed that the Raman intensity ratios ( I xx : I yy : I zz ) of optical phonons A g 1 and A g 2 modes along different axes are 1:4.8:2.76 and 6.9:1:5.7 , respectively. Based on the definition of Raman intensity, we abstracted integral Raman tensors of black arsenic. In addition, according to density functional theory, it can be affirmed that the Raman anisotropy of A g mode is sourced from the anisotropy of differential polarizability along different crystal axes.