Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/328669
Type: Artigo
Title: Edge Phonons In Black Phosphorus
Edge phonons in black phosphorus
Author: Ribeiro, H. B.
Villegas, C. E. P.
Bahamon, D. A.
Muraca, D.
Castro Neto, A. H. C.
Souza, E. A. T. de
Rocha, A. R.
Pimenta, M. A.
Matos, C. J. S. de
Abstract: Black phosphorus has recently emerged as a new layered crystal that, due to its peculiar and anisotropic crystalline and electronic band structures, may have important applications in electronics, optoelectronics and photonics. Despite the fact that the edges of layered crystals host a range of singular properties whose characterization and exploitation are of utmost importance for device development, the edges of black phosphorus remain poorly characterized. In this work, the atomic structure and behaviour of phonons near different black phosphorus edges are experimentally and theoretically studied using Raman spectroscopy and density functional theory calculations. Polarized Raman results show the appearance of new modes at the edges of the sample, and their spectra depend on the atomic structure of the edges (zigzag or armchair). Theoretical simulations confirm that the new modes are due to edge phonon states that are forbidden in the bulk, and originated from the lattice termination rearrangements.
Black phosphorus has recently emerged as a new layered crystal that, due to its peculiar and anisotropic crystalline and electronic band structures, may have important applications in electronics, optoelectronics and photonics. Despite the fact that the edges of layered crystals host a range of singular properties whose characterization and exploitation are of utmost importance for device development, the edges of black phosphorus remain poorly characterized. In this work, the atomic structure and behaviour of phonons near different black phosphorus edges are experimentally and theoretically studied using Raman spectroscopy and density functional theory calculations. Polarized Raman results show the appearance of new modes at the edges of the sample, and their spectra depend on the atomic structure of the edges (zigzag or armchair). Theoretical simulations confirm that the new modes are due to edge phonon states that are forbidden in the bulk, and originated from the lattice termination rearrangements.
Subject: Inplane Thermal-conductivity
Raman
Nanoribbons
Transport
Condutividade térmica, Teoria do funcional de densidade, Espectroscopia Raman
Country: Reino Unido
Editor: Nature Publishing Group
Citation: Nature Communications. Nature Publishing Group, v. 7, p. , 2016.
Rights: aberto
Identifier DOI: 10.1038/ncomms12191
Address: https://www.nature.com/articles/ncomms12191
Date Issue: 2016
Appears in Collections:IFGW - Artigos e Outros Documentos

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