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Unusual angular dependence of the Raman response in black phosphorus.
Ribeiro, Henrique B; Pimenta, Marcos A; de Matos, Christiano J S; Moreira, Roberto Luiz; Rodin, Aleksandr S; Zapata, Juan D; de Souza, Eunézio A T; Castro Neto, Antonio H.
Afiliação
  • Ribeiro HB; †Mackgraphe-Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil.
  • Pimenta MA; ‡Departamento de Física, UFMG, 30123-970 Belo Horizonte, Brazil.
  • de Matos CJ; †Mackgraphe-Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil.
  • Moreira RL; ‡Departamento de Física, UFMG, 30123-970 Belo Horizonte, Brazil.
  • Rodin AS; §Centre for Advanced 2D Materials and Graphene Research Centre Faculty of Science, National University of Singapore, 119077 Singapore.
  • Zapata JD; †Mackgraphe-Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil.
  • de Souza EA; ⊥Universidad de Antioquia, Medellin Colombia.
  • Castro Neto AH; †Mackgraphe-Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, 01302-907 São Paulo, Brazil.
ACS Nano ; 9(4): 4270-6, 2015 Apr 28.
Article em En | MEDLINE | ID: mdl-25752593
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos