Unusual Angular Dependence of the Raman Response in Black Phosphorus

Autor(es)

Ribeiro, Henrique B. ^[1] ; Pimenta, Marcos A. ^[2] ; de Matos, Christiano J. S. ^[1] ; Moreira, Roberto Luiz ^[2] ; Rodin, Aleksandr S. ^{[3, 4]} ; Zapata, Juan D. ^{[5, 1]} ; de Souza, Eunezio A. T. ^[1] ; Castro Neto, Antonio H. ^{[3, 4, 6, 7]}

Afiliação do(s) autor(es)

^[1] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil

^[2] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG - Brazil

^[3] Natl Univ Singapore, Ctr Adv Mat 2D, Fac Sci, Singapore 119077 - Singapore

^[4] Natl Univ Singapore, Fac Sci, Graphene Res Ctr, Singapore 119077 - Singapore

^[5] Univ Antioquia, Medellin - Colombia

^[6] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 119077 - Singapore

^[7] Natl Univ Singapore, Natl Grad Sch Integrat Sci & Engn, Singapore 119077 - Singapore

• Tipo de documento: Artigo Científico
• Fonte: ACS NANO; v. 9, n. 4, p. 4270-4276, APR 2015.
• Citações Web of Science: 148

Resumo

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 213 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. (AU)

• Processo FAPESP: 12/50259-8 - Grafeno: fotônica e opto-eletrônica: colaboração UPM-NUS
• Beneficiário: Antonio Helio de Castro Neto
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC