Vibrational properties of a two-dimensional silica kagome lattice

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Torbjörn Björkman, Viera Skakalova, Simon Kurasch, Ute Kaiser, Jannik C. Meyer, Jurgen H. Smet, Arkady V. Krasheninnikov
Publication year: 2016
Journal: ACS Nano
Volume number: 10
Issue number: 12
Start page: 10929
End page: 10935
eISSN: 1936-086X


Abstract

Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon–phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.


Keywords

2D materials, anharmonicity, Density functional theory, Raman spectroscopy, silicon/silicon dioxide

Last updated on 2019-17-08 at 06:48