Vibrational Properties of a Two-Dimensional Silica Kagome Lattice

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016-12-27
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
10929-10935
Series
ACS NANO, Volume 10, issue 12
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.
Description
Keywords
2D materials, 2D silicon dioxide, anharmonicity, density functional theory, kagome, Raman spectroscopy
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Citation
Björkman , T , Skakalova , V , Kurasch , S , Kaiser , U , Meyer , J C , Smet , J H & Krasheninnikov , A V 2016 , ' Vibrational Properties of a Two-Dimensional Silica Kagome Lattice ' , ACS Nano , vol. 10 , no. 12 , pp. 10929-10935 . https://doi.org/10.1021/acsnano.6b05577