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Ribeiro HB, Pimenta MA, de Matos CJ, et al. Unusual angular dependence of the Raman response in black phosphorus. ACS Nano. 2015;9(4):4270-6doi: 10.1021/acsnano.5b00698.
Ribeiro, H. B., Pimenta, M. A., de Matos, C. J., Moreira, R. L., Rodin, A. S., Zapata, J. D., de Souza, E. A., & Castro Neto, A. H. (2015). Unusual angular dependence of the Raman response in black phosphorus. ACS nano, 9(4), 4270-6. https://doi.org/10.1021/acsnano.5b00698
Ribeiro, Henrique B, et al. "Unusual angular dependence of the Raman response in black phosphorus." ACS nano vol. 9,4 (2015): 4270-6. doi: https://doi.org/10.1021/acsnano.5b00698
Ribeiro HB, Pimenta MA, de Matos CJ, Moreira RL, Rodin AS, Zapata JD, de Souza EA, Castro Neto AH. Unusual angular dependence of the Raman response in black phosphorus. ACS Nano. 2015 Apr 28;9(4):4270-6. doi: 10.1021/acsnano.5b00698. Epub 2015 Mar 16. PMID: 25752593.
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ACS Nano. 2015 Apr 28;9(4):4270-6. doi: 10.1021/acsnano.5b00698. Epub 2015 Mar 16.

Unusual angular dependence of the Raman response in black phosphorus.

ACS nano

Henrique B Ribeiro, Marcos A Pimenta, Christiano J S de Matos, Roberto Luiz Moreira, Aleksandr S Rodin, Juan D Zapata, Eunézio A T de Souza, Antonio H Castro Neto

Affiliations

  1. †Mackgraphe-Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil.
  2. ‡Departamento de Física, UFMG, 30123-970 Belo Horizonte, Brazil.
  3. §Centre for Advanced 2D Materials and Graphene Research Centre Faculty of Science, National University of Singapore, 119077 Singapore.
  4. ?Universidad de Antioquia, Medellin Colombia.
  5. ?Department of Physics Faculty of Science, National University of Singapore, 119077 Singapore.

PMID: 25752593 DOI: 10.1021/acsnano.5b00698

Abstract

Anisotropic materials are characterized by a unique optical response, which is highly polarization-dependent. Of particular interest are layered materials formed by the stacking of two-dimensional (2D) crystals that are naturally anisotropic in the direction perpendicular to the 2D planes. Black phosphorus (BP) is a stack of 2D phosphorene crystals and a highly anisotropic semiconductor with a direct band gap. We show that the angular dependence of polarized Raman spectra of BP is rather unusual and can be explained only by considering complex values for the Raman tensor elements. This result can be traced back to the electron-photon and electron-phonon interactions in this material.

Keywords: black phosphorus; electron−phonon coupling; linear dichroism; phosphorene; polarized Raman spectroscopy

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